diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 35a8f65c06..9245c58760 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -11,6 +11,9 @@
 
 #include "Application.h"
 
+#include <chrono>
+#include <thread>
+
 #include <gl/Config.h>
 #include <glm/glm.hpp>
 #include <glm/gtx/component_wise.hpp>
@@ -144,6 +147,7 @@
 #include "InterfaceLogging.h"
 #include "LODManager.h"
 #include "ModelPackager.h"
+#include "networking/CloseEventSender.h"
 #include "networking/HFWebEngineProfile.h"
 #include "networking/HFTabletWebEngineProfile.h"
 #include "networking/FileTypeProfile.h"
@@ -534,6 +538,7 @@ bool setupEssentials(int& argc, char** argv, bool runningMarkerExisted) {
     DependencyManager::set<AvatarBookmarks>();
     DependencyManager::set<LocationBookmarks>();
     DependencyManager::set<Snapshot>();
+    DependencyManager::set<CloseEventSender>();
 
     return previousSessionCrashed;
 }
@@ -1570,6 +1575,14 @@ void Application::aboutToQuit() {
 
     getActiveDisplayPlugin()->deactivate();
 
+    // use the CloseEventSender via a QThread to send an event that says the user asked for the app to close
+    auto closeEventSender = DependencyManager::get<CloseEventSender>();
+    QThread* closureEventThread = new QThread(this);
+    closeEventSender->moveToThread(closureEventThread);
+    // sendQuitEventAsync will bail immediately if the UserActivityLogger is not enabled
+    connect(closureEventThread, &QThread::started, closeEventSender.data(), &CloseEventSender::sendQuitEventAsync);
+    closureEventThread->start();
+
     // Hide Running Scripts dialog so that it gets destroyed in an orderly manner; prevents warnings at shutdown.
     DependencyManager::get<OffscreenUi>()->hide("RunningScripts");
 
@@ -1738,6 +1751,15 @@ Application::~Application() {
 
     _window->deleteLater();
 
+    // make sure that the quit event has finished sending before we take the application down
+    auto closeEventSender = DependencyManager::get<CloseEventSender>();
+    while (!closeEventSender->hasFinishedQuitEvent() && !closeEventSender->hasTimedOutQuitEvent()) {
+        // sleep a little so we're not spinning at 100%
+        std::this_thread::sleep_for(std::chrono::milliseconds(10));
+    }
+    // quit the thread used by the closure event sender
+    closeEventSender->thread()->quit();
+
     // Can't log to file passed this point, FileLogger about to be deleted
     qInstallMessageHandler(LogHandler::verboseMessageHandler);
 }
@@ -2388,15 +2410,16 @@ void Application::handleSandboxStatus(QNetworkReply* reply) {
 
     // Check HMD use (may be technically available without being in use)
     bool hasHMD = PluginUtils::isHMDAvailable();
-    bool isUsingHMD = hasHMD && hasHandControllers && _displayPlugin->isHmd();
+    bool isUsingHMD = _displayPlugin->isHmd();
+    bool isUsingHMDAndHandControllers = hasHMD && hasHandControllers && isUsingHMD;
 
     Setting::Handle<bool> tutorialComplete{ "tutorialComplete", false };
     Setting::Handle<bool> firstRun{ Settings::firstRun, true };
 
     bool isTutorialComplete = tutorialComplete.get();
-    bool shouldGoToTutorial = isUsingHMD && hasTutorialContent && !isTutorialComplete;
+    bool shouldGoToTutorial = isUsingHMDAndHandControllers && hasTutorialContent && !isTutorialComplete;
 
-    qCDebug(interfaceapp) << "HMD:" << hasHMD << ", Hand Controllers: " << hasHandControllers << ", Using HMD: " << isUsingHMD;
+    qCDebug(interfaceapp) << "HMD:" << hasHMD << ", Hand Controllers: " << hasHandControllers << ", Using HMD: " << isUsingHMDAndHandControllers;
     qCDebug(interfaceapp) << "Tutorial version:" << contentVersion << ", sufficient:" << hasTutorialContent <<
         ", complete:" << isTutorialComplete << ", should go:" << shouldGoToTutorial;
 
@@ -2410,10 +2433,18 @@ void Application::handleSandboxStatus(QNetworkReply* reply) {
 
     const QString TUTORIAL_PATH = "/tutorial_begin";
 
+    static const QString SENT_TO_TUTORIAL = "tutorial";
+    static const QString SENT_TO_PREVIOUS_LOCATION = "previous_location";
+    static const QString SENT_TO_ENTRY = "entry";
+    static const QString SENT_TO_SANDBOX = "sandbox";
+
+    QString sentTo;
+
     if (shouldGoToTutorial) {
         if (sandboxIsRunning) {
             qCDebug(interfaceapp) << "Home sandbox appears to be running, going to Home.";
             DependencyManager::get<AddressManager>()->goToLocalSandbox(TUTORIAL_PATH);
+            sentTo = SENT_TO_TUTORIAL;
         } else {
             qCDebug(interfaceapp) << "Home sandbox does not appear to be running, going to Entry.";
             if (firstRun.get()) {
@@ -2421,8 +2452,10 @@ void Application::handleSandboxStatus(QNetworkReply* reply) {
             }
             if (addressLookupString.isEmpty()) {
                 DependencyManager::get<AddressManager>()->goToEntry();
+                sentTo = SENT_TO_ENTRY;
             } else {
                 DependencyManager::get<AddressManager>()->loadSettings(addressLookupString);
+                sentTo = SENT_TO_PREVIOUS_LOCATION;
             }
         }
     } else {
@@ -2435,23 +2468,40 @@ void Application::handleSandboxStatus(QNetworkReply* reply) {
 
         // If this is a first run we short-circuit the address passed in
         if (isFirstRun) {
-            if (isUsingHMD) {
+            if (isUsingHMDAndHandControllers) {
                 if (sandboxIsRunning) {
                     qCDebug(interfaceapp) << "Home sandbox appears to be running, going to Home.";
                     DependencyManager::get<AddressManager>()->goToLocalSandbox();
+                    sentTo = SENT_TO_SANDBOX;
                 } else {
                     qCDebug(interfaceapp) << "Home sandbox does not appear to be running, going to Entry.";
                     DependencyManager::get<AddressManager>()->goToEntry();
+                    sentTo = SENT_TO_ENTRY;
                 }
             } else {
                 DependencyManager::get<AddressManager>()->goToEntry();
+                sentTo = SENT_TO_ENTRY;
             }
         } else {
             qCDebug(interfaceapp) << "Not first run... going to" << qPrintable(addressLookupString.isEmpty() ? QString("previous location") : addressLookupString);
             DependencyManager::get<AddressManager>()->loadSettings(addressLookupString);
+            sentTo = SENT_TO_PREVIOUS_LOCATION;
         }
     }
 
+    UserActivityLogger::getInstance().logAction("startup_sent_to", {
+        { "sent_to", sentTo },
+        { "sandbox_is_running", sandboxIsRunning },
+        { "has_hmd", hasHMD },
+        { "has_hand_controllers", hasHandControllers },
+        { "is_using_hmd", isUsingHMD },
+        { "is_using_hmd_and_hand_controllers", isUsingHMDAndHandControllers },
+        { "content_version", contentVersion },
+        { "is_tutorial_complete", isTutorialComplete },
+        { "has_tutorial_content", hasTutorialContent },
+        { "should_go_to_tutorial", shouldGoToTutorial }
+    });
+
     _connectionMonitor.init();
 
     // After all of the constructor is completed, then set firstRun to false.
diff --git a/interface/src/Menu.cpp b/interface/src/Menu.cpp
index 4138798484..463069430d 100644
--- a/interface/src/Menu.cpp
+++ b/interface/src/Menu.cpp
@@ -407,6 +407,12 @@ Menu::Menu() {
 #endif
 
 
+    {
+        auto action = addActionToQMenuAndActionHash(renderOptionsMenu, MenuOption::RenderClearKtxCache);
+        connect(action, &QAction::triggered, []{
+            Setting::Handle<int>(KTXCache::SETTING_VERSION_NAME, KTXCache::INVALID_VERSION).set(KTXCache::INVALID_VERSION);
+        });
+    }
 
     // Developer > Render > LOD Tools
     addActionToQMenuAndActionHash(renderOptionsMenu, MenuOption::LodTools, 0,
diff --git a/interface/src/Menu.h b/interface/src/Menu.h
index b6d72f5446..41bf89a20a 100644
--- a/interface/src/Menu.h
+++ b/interface/src/Menu.h
@@ -145,6 +145,7 @@ namespace MenuOption {
     const QString Quit =  "Quit";
     const QString ReloadAllScripts = "Reload All Scripts";
     const QString ReloadContent = "Reload Content (Clears all caches)";
+    const QString RenderClearKtxCache = "Clear KTX Cache (requires restart)";
     const QString RenderMaxTextureMemory = "Maximum Texture Memory";
     const QString RenderMaxTextureAutomatic = "Automatic Texture Memory";
     const QString RenderMaxTexture4MB = "4 MB";
diff --git a/interface/src/main.cpp b/interface/src/main.cpp
index 49517eb38e..63738d2d91 100644
--- a/interface/src/main.cpp
+++ b/interface/src/main.cpp
@@ -24,7 +24,6 @@
 #include <SandboxUtils.h>
 #include <SharedUtil.h>
 
-
 #include "AddressManager.h"
 #include "Application.h"
 #include "InterfaceLogging.h"
diff --git a/interface/src/networking/CloseEventSender.cpp b/interface/src/networking/CloseEventSender.cpp
new file mode 100644
index 0000000000..8c3d6ae888
--- /dev/null
+++ b/interface/src/networking/CloseEventSender.cpp
@@ -0,0 +1,90 @@
+//
+//  CloseEventSender.cpp
+//  interface/src/networking
+//
+//  Created by Stephen Birarda on 5/31/17.
+//  Copyright 2017 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include <QtCore/QDateTime>
+#include <QtCore/QEventLoop>
+#include <QtCore/QJsonDocument>
+#include <QtNetwork/QNetworkReply>
+
+#include <AccountManager.h>
+#include <NetworkAccessManager.h>
+#include <NetworkingConstants.h>
+#include <NetworkLogging.h>
+#include <UserActivityLogger.h>
+#include <UUID.h>
+
+#include "CloseEventSender.h"
+
+QNetworkRequest createNetworkRequest() {
+
+    QNetworkRequest request;
+
+    QUrl requestURL = NetworkingConstants::METAVERSE_SERVER_URL;
+    requestURL.setPath(USER_ACTIVITY_URL);
+
+    request.setUrl(requestURL);
+
+    auto accountManager = DependencyManager::get<AccountManager>();
+
+    if (accountManager->hasValidAccessToken()) {
+        request.setRawHeader(ACCESS_TOKEN_AUTHORIZATION_HEADER,
+                             accountManager->getAccountInfo().getAccessToken().authorizationHeaderValue());
+    }
+
+    request.setRawHeader(METAVERSE_SESSION_ID_HEADER,
+                         uuidStringWithoutCurlyBraces(accountManager->getSessionID()).toLocal8Bit());
+
+    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
+
+    request.setPriority(QNetworkRequest::HighPriority);
+
+    return request;
+}
+
+QByteArray postDataForAction(QString action) {
+    return QString("{\"action_name\": \"" + action + "\"}").toUtf8();
+}
+
+QNetworkReply* replyForAction(QString action) {
+    QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
+    return networkAccessManager.post(createNetworkRequest(), postDataForAction(action));
+}
+
+void CloseEventSender::sendQuitEventAsync() {
+    if (UserActivityLogger::getInstance().isEnabled()) {
+        QNetworkReply* reply = replyForAction("quit");
+        connect(reply, &QNetworkReply::finished, this, &CloseEventSender::handleQuitEventFinished);
+        _quitEventStartTimestamp = QDateTime::currentMSecsSinceEpoch();
+    } else {
+        _hasFinishedQuitEvent = true;
+    }
+}
+
+void CloseEventSender::handleQuitEventFinished() {
+    _hasFinishedQuitEvent = true;
+
+    auto reply = qobject_cast<QNetworkReply*>(sender());
+    if (reply->error() == QNetworkReply::NoError) {
+        qCDebug(networking) << "Quit event sent successfully";
+    } else {
+        qCDebug(networking) << "Failed to send quit event -" << reply->errorString();
+    }
+
+    reply->deleteLater();
+}
+
+bool CloseEventSender::hasTimedOutQuitEvent() {
+    const int CLOSURE_EVENT_TIMEOUT_MS = 5000;
+    return _quitEventStartTimestamp != 0
+        && QDateTime::currentMSecsSinceEpoch() - _quitEventStartTimestamp > CLOSURE_EVENT_TIMEOUT_MS;
+}
+
+
diff --git a/interface/src/networking/CloseEventSender.h b/interface/src/networking/CloseEventSender.h
new file mode 100644
index 0000000000..05e6f81ad4
--- /dev/null
+++ b/interface/src/networking/CloseEventSender.h
@@ -0,0 +1,41 @@
+//
+//  CloseEventSender.h
+//  interface/src/networking
+//
+//  Created by Stephen Birarda on 5/31/17.
+//  Copyright 2017 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#ifndef hifi_CloseEventSender_h
+#define hifi_CloseEventSender_h
+
+#include <atomic>
+
+#include <QtCore/QString>
+#include <QtCore/QUuid>
+
+#include <DependencyManager.h>
+
+class CloseEventSender : public QObject, public Dependency {
+    Q_OBJECT
+    SINGLETON_DEPENDENCY
+
+public:
+    bool hasTimedOutQuitEvent();
+    bool hasFinishedQuitEvent() { return _hasFinishedQuitEvent; }
+
+public slots:
+    void sendQuitEventAsync();
+
+private slots:
+    void handleQuitEventFinished();
+
+private:
+    std::atomic<bool> _hasFinishedQuitEvent { false };
+    std::atomic<int64_t> _quitEventStartTimestamp;
+};
+
+#endif // hifi_CloseEventSender_h
diff --git a/libraries/model-networking/src/model-networking/KTXCache.cpp b/libraries/model-networking/src/model-networking/KTXCache.cpp
index e0447af8e6..6443748920 100644
--- a/libraries/model-networking/src/model-networking/KTXCache.cpp
+++ b/libraries/model-networking/src/model-networking/KTXCache.cpp
@@ -11,14 +11,28 @@
 
 #include "KTXCache.h"
 
+#include <SettingHandle.h>
 #include <ktx/KTX.h>
 
 using File = cache::File;
 using FilePointer = cache::FilePointer;
 
+// Whenever a change is made to the serialized format for the KTX cache that isn't backward compatible,
+// this value should be incremented.  This will force the KTX cache to be wiped
+const int KTXCache::CURRENT_VERSION = 0x01;
+const int KTXCache::INVALID_VERSION = 0x00;
+const char* KTXCache::SETTING_VERSION_NAME = "hifi.ktx.cache_version";
+
 KTXCache::KTXCache(const std::string& dir, const std::string& ext) :
     FileCache(dir, ext) {
     initialize();
+
+    Setting::Handle<int> cacheVersionHandle(SETTING_VERSION_NAME, INVALID_VERSION);
+    auto cacheVersion = cacheVersionHandle.get();
+    if (cacheVersion != CURRENT_VERSION) {
+        wipe();
+        cacheVersionHandle.set(CURRENT_VERSION);
+    }
 }
 
 KTXFilePointer KTXCache::writeFile(const char* data, Metadata&& metadata) {
diff --git a/libraries/model-networking/src/model-networking/KTXCache.h b/libraries/model-networking/src/model-networking/KTXCache.h
index bbf7ceadea..5617019c52 100644
--- a/libraries/model-networking/src/model-networking/KTXCache.h
+++ b/libraries/model-networking/src/model-networking/KTXCache.h
@@ -27,6 +27,12 @@ class KTXCache : public cache::FileCache {
     Q_OBJECT
 
 public:
+    // Whenever a change is made to the serialized format for the KTX cache that isn't backward compatible,
+    // this value should be incremented.  This will force the KTX cache to be wiped
+    static const int CURRENT_VERSION;
+    static const int INVALID_VERSION;
+    static const char* SETTING_VERSION_NAME;
+
     KTXCache(const std::string& dir, const std::string& ext);
 
     KTXFilePointer writeFile(const char* data, Metadata&& metadata);
diff --git a/libraries/networking/src/AccountManager.cpp b/libraries/networking/src/AccountManager.cpp
index c6fffbfdbd..fa6b49597d 100644
--- a/libraries/networking/src/AccountManager.cpp
+++ b/libraries/networking/src/AccountManager.cpp
@@ -45,7 +45,6 @@ Q_DECLARE_METATYPE(QNetworkAccessManager::Operation)
 Q_DECLARE_METATYPE(JSONCallbackParameters)
 
 const QString ACCOUNTS_GROUP = "accounts";
-static const auto METAVERSE_SESSION_ID_HEADER = QString("HFM-SessionID").toLocal8Bit();
 
 JSONCallbackParameters::JSONCallbackParameters(QObject* jsonCallbackReceiver, const QString& jsonCallbackMethod,
                                                QObject* errorCallbackReceiver, const QString& errorCallbackMethod,
diff --git a/libraries/networking/src/AccountManager.h b/libraries/networking/src/AccountManager.h
index 9a456ca7e8..b37846ec1b 100644
--- a/libraries/networking/src/AccountManager.h
+++ b/libraries/networking/src/AccountManager.h
@@ -52,6 +52,7 @@ namespace AccountManagerAuth {
 Q_DECLARE_METATYPE(AccountManagerAuth::Type);
 
 const QByteArray ACCESS_TOKEN_AUTHORIZATION_HEADER = "Authorization";
+const auto METAVERSE_SESSION_ID_HEADER = QString("HFM-SessionID").toLocal8Bit();
 
 using UserAgentGetter = std::function<QString()>;
 
diff --git a/libraries/networking/src/FileCache.cpp b/libraries/networking/src/FileCache.cpp
index 6cb8cd8f7c..95304e3866 100644
--- a/libraries/networking/src/FileCache.cpp
+++ b/libraries/networking/src/FileCache.cpp
@@ -236,6 +236,28 @@ namespace cache {
     };
 }
 
+void FileCache::eject(const FilePointer& file) {
+    file->_cache = nullptr;
+    const auto& length = file->getLength();
+    const auto& key = file->getKey();
+
+    {
+        Lock lock(_filesMutex);
+        if (0 != _files.erase(key)) {
+            _numTotalFiles -= 1;
+            _totalFilesSize -= length;
+        }
+    }
+
+    {
+        Lock unusedLock(_unusedFilesMutex);
+        if (0 != _unusedFiles.erase(file)) {
+            _numUnusedFiles -= 1;
+            _unusedFilesSize -= length;
+        }
+    }
+}
+
 void FileCache::clean() {
     size_t overbudgetAmount = getOverbudgetAmount();
 
@@ -250,28 +272,23 @@ void FileCache::clean() {
     for (const auto& file : _unusedFiles) {
         queue.push(file);
     }
+
     while (!queue.empty() && overbudgetAmount > 0) {
         auto file = queue.top();
         queue.pop();
+        eject(file);
         auto length = file->getLength();
-
-        unusedLock.unlock();
-        {
-            file->_cache = nullptr;
-            Lock lock(_filesMutex);
-            _files.erase(file->getKey());
-        }
-        unusedLock.lock();
-
-        _unusedFiles.erase(file);
-        _numTotalFiles -= 1;
-        _numUnusedFiles -= 1;
-        _totalFilesSize -= length;
-        _unusedFilesSize -= length;
         overbudgetAmount -= std::min(length, overbudgetAmount);
     }
 }
 
+void FileCache::wipe() {
+    Lock unusedFilesLock(_unusedFilesMutex);
+    while (!_unusedFiles.empty()) {
+        eject(*_unusedFiles.begin());
+    }
+}
+
 void FileCache::clear() {
     // Eliminate any overbudget files
     clean();
diff --git a/libraries/networking/src/FileCache.h b/libraries/networking/src/FileCache.h
index 040e1ab592..f29d75f779 100644
--- a/libraries/networking/src/FileCache.h
+++ b/libraries/networking/src/FileCache.h
@@ -46,6 +46,9 @@ public:
     FileCache(const std::string& dirname, const std::string& ext, QObject* parent = nullptr);
     virtual ~FileCache();
 
+    // Remove all unlocked items from the cache
+    void wipe();
+
     size_t getNumTotalFiles() const { return _numTotalFiles; }
     size_t getNumCachedFiles() const { return _numUnusedFiles; }
     size_t getSizeTotalFiles() const { return _totalFilesSize; }
@@ -95,6 +98,9 @@ public:
 private:
     using Mutex = std::recursive_mutex;
     using Lock = std::unique_lock<Mutex>;
+    using Map = std::unordered_map<Key, std::weak_ptr<File>>;
+    using Set = std::unordered_set<FilePointer>;
+    using KeySet = std::unordered_set<Key>;
 
     friend class File;
 
@@ -105,6 +111,8 @@ private:
     void removeUnusedFile(const FilePointer& file);
     void clean();
     void clear();
+    // Remove a file from the cache
+    void eject(const FilePointer& file);
 
     size_t getOverbudgetAmount() const;
 
@@ -122,10 +130,10 @@ private:
     std::string _dirpath;
     bool _initialized { false };
 
-    std::unordered_map<Key, std::weak_ptr<File>> _files;
+    Map _files;
     Mutex _filesMutex;
 
-    std::unordered_set<FilePointer> _unusedFiles;
+    Set _unusedFiles;
     Mutex _unusedFilesMutex;
 };
 
@@ -136,8 +144,8 @@ public:
     using Key = FileCache::Key;
     using Metadata = FileCache::Metadata;
 
-    Key getKey() const { return _key; }
-    size_t getLength() const { return _length; }
+    const Key& getKey() const { return _key; }
+    const size_t& getLength() const { return _length; }
     std::string getFilepath() const { return _filepath; }
 
     virtual ~File();
diff --git a/libraries/networking/src/UserActivityLogger.cpp b/libraries/networking/src/UserActivityLogger.cpp
index e2dd110cfd..28117c0933 100644
--- a/libraries/networking/src/UserActivityLogger.cpp
+++ b/libraries/networking/src/UserActivityLogger.cpp
@@ -20,8 +20,6 @@
 #include <DependencyManager.h>
 #include "AddressManager.h"
 
-static const QString USER_ACTIVITY_URL = "/api/v1/user_activities";
-
 UserActivityLogger& UserActivityLogger::getInstance() {
     static UserActivityLogger sharedInstance;
     return sharedInstance;
diff --git a/libraries/networking/src/UserActivityLogger.h b/libraries/networking/src/UserActivityLogger.h
index b41960a8ad..9fad498b86 100644
--- a/libraries/networking/src/UserActivityLogger.h
+++ b/libraries/networking/src/UserActivityLogger.h
@@ -22,6 +22,8 @@
 #include <SettingHandle.h>
 #include "AddressManager.h"
 
+const QString USER_ACTIVITY_URL = "/api/v1/user_activities";
+
 class UserActivityLogger : public QObject {
     Q_OBJECT
     
diff --git a/tests/networking/src/FileCacheTests.cpp b/tests/networking/src/FileCacheTests.cpp
index 0813d05a54..79fe9dee54 100644
--- a/tests/networking/src/FileCacheTests.cpp
+++ b/tests/networking/src/FileCacheTests.cpp
@@ -113,18 +113,21 @@ void FileCacheTests::testUnusedFiles() {
             QVERIFY(!file.get());
         }
 
-        QThread::msleep(1000);
         // Test files 90 to 99 are present
         for (int i = 90; i < 100; ++i) {
             std::string key = getFileKey(i);
             auto file = cache->getFile(key);
             QVERIFY(file.get());
             inUseFiles.push_back(file);
-            // Each access touches the file, so we need to sleep here to ensure that the files are 
-            // spaced out in numeric order, otherwise later tests can't reliably determine the order 
-            // for cache ejection
-            QThread::msleep(1000);
+
+            if (i == 94) {
+                // Each access touches the file, so we need to sleep here to ensure that the the last 5 files 
+                // have later times for cache ejection priority, otherwise the test runs too fast to reliably
+                // differentiate 
+                QThread::msleep(1000);
+            }
         }
+        
         QCOMPARE(cache->getNumCachedFiles(), (size_t)0);
         QCOMPARE(cache->getNumTotalFiles(), (size_t)10);
         inUseFiles.clear();
@@ -165,6 +168,20 @@ void FileCacheTests::testFreeSpacePreservation() {
     }
 }
 
+void FileCacheTests::testWipe() {
+    // Reset the cache
+    auto cache = makeFileCache(_testDir.path());
+    QCOMPARE(cache->getNumCachedFiles(), (size_t)5);
+    QCOMPARE(cache->getNumTotalFiles(), (size_t)5);
+    cache->wipe();
+    QCOMPARE(cache->getNumCachedFiles(), (size_t)0);
+    QCOMPARE(cache->getNumTotalFiles(), (size_t)0);
+    QVERIFY(getCacheDirectorySize() > 0);
+    forceDeletes();
+    QCOMPARE(getCacheDirectorySize(), (size_t)0);
+}
+
+
 void FileCacheTests::cleanupTestCase() {
 }
 
diff --git a/tests/networking/src/FileCacheTests.h b/tests/networking/src/FileCacheTests.h
index 838c15afb8..b34b384855 100644
--- a/tests/networking/src/FileCacheTests.h
+++ b/tests/networking/src/FileCacheTests.h
@@ -20,6 +20,7 @@ private slots:
     void testUnusedFiles();
     void testFreeSpacePreservation();
     void cleanupTestCase();
+    void testWipe();
 
 private:
     size_t getFreeSpace() const;
diff --git a/unpublishedScripts/marketplace/stopwatch/models/transparent-box.fbx b/unpublishedScripts/marketplace/stopwatch/models/transparent-box.fbx
new file mode 100644
index 0000000000..b1df7d962c
Binary files /dev/null and b/unpublishedScripts/marketplace/stopwatch/models/transparent-box.fbx differ
diff --git a/unpublishedScripts/marketplace/stopwatch/spawnStopwatch.js b/unpublishedScripts/marketplace/stopwatch/spawnStopwatch.js
index e72f949163..3a0a8a506b 100644
--- a/unpublishedScripts/marketplace/stopwatch/spawnStopwatch.js
+++ b/unpublishedScripts/marketplace/stopwatch/spawnStopwatch.js
@@ -43,13 +43,47 @@ var minuteHandID = Entities.addEntity({
     modelURL: Script.resolvePath("models/Stopwatch-min-hand.fbx"),
 });
 
+var startStopButtonID = Entities.addEntity({
+    type: "Model",
+    name: "stopwatch/startStop",
+    parentID: stopwatchID,
+    dimensions: Vec3.multiply(scale, { x: 0.8, y: 0.8, z: 1.0 }),
+    localPosition: Vec3.multiply(scale, { x: 0, y: -0.1, z: -2.06 }),
+    modelURL: Script.resolvePath("models/transparent-box.fbx")
+});
+
+var resetButtonID = Entities.addEntity({
+    type: "Model",
+    name: "stopwatch/startStop",
+    parentID: stopwatchID,
+    dimensions: Vec3.multiply(scale, { x: 0.6, y: 0.6, z: 0.8 }),
+    localPosition: Vec3.multiply(scale, { x: -1.5, y: -0.1, z: -1.2 }),
+    localRotation: Quat.fromVec3Degrees({ x: 0, y: 36, z: 0 }),
+    modelURL: Script.resolvePath("models/transparent-box.fbx")
+});
+
 Entities.editEntity(stopwatchID, {
     userData: JSON.stringify({
         secondHandID: secondHandID,
-        minuteHandID: minuteHandID,
+        minuteHandID: minuteHandID
     }),
-    script: Script.resolvePath("stopwatchClient.js"),
     serverScripts: Script.resolvePath("stopwatchServer.js")
 });
 
+Entities.editEntity(startStopButtonID, {
+    userData: JSON.stringify({
+        stopwatchID: stopwatchID,
+        grabbableKey: { wantsTrigger: true }
+    }),
+    script: Script.resolvePath("stopwatchStartStop.js")
+});
+
+Entities.editEntity(resetButtonID, {
+    userData: JSON.stringify({
+        stopwatchID: stopwatchID,
+        grabbableKey: { wantsTrigger: true }
+    }),
+    script: Script.resolvePath("stopwatchReset.js")
+});
+
 Script.stop()
diff --git a/unpublishedScripts/marketplace/stopwatch/stopwatchReset.js b/unpublishedScripts/marketplace/stopwatch/stopwatchReset.js
new file mode 100644
index 0000000000..b65c1e7340
--- /dev/null
+++ b/unpublishedScripts/marketplace/stopwatch/stopwatchReset.js
@@ -0,0 +1,22 @@
+//
+//  stopwatchReset.js
+//
+//  Created by David Rowe on 26 May 2017.
+//  Copyright 2017 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+(function () {
+    this.preload = function (entityID) {
+        var properties = Entities.getEntityProperties(entityID, "userData");
+        this.messageChannel = "STOPWATCH-" + JSON.parse(properties.userData).stopwatchID;
+    };
+    function click() {
+        Messages.sendMessage(this.messageChannel, "reset");
+    }
+    this.startNearTrigger = click;
+    this.startFarTrigger = click;
+    this.clickDownOnEntity = click;
+});
diff --git a/unpublishedScripts/marketplace/stopwatch/stopwatchServer.js b/unpublishedScripts/marketplace/stopwatch/stopwatchServer.js
index 925db565c3..6ae1b69087 100644
--- a/unpublishedScripts/marketplace/stopwatch/stopwatchServer.js
+++ b/unpublishedScripts/marketplace/stopwatch/stopwatchServer.js
@@ -13,6 +13,7 @@
 
     self.equipped = false;
     self.isActive = false;
+    self.seconds = 0;
 
     self.secondHandID = null;
     self.minuteHandID = null;
@@ -46,11 +47,19 @@
     };
     self.messageReceived = function(channel, message, sender) {
         print("Message received", channel, sender, message); 
-        if (channel === self.messageChannel && message === 'click') {
-            if (self.isActive) {
-                self.resetTimer();
-            } else {
-                self.startTimer();
+        if (channel === self.messageChannel) {
+            switch (message) {
+                case "startStop":
+                    if (self.isActive) {
+                        self.stopTimer();
+                    } else {
+                        self.startTimer();
+                    }
+                    break;
+                case "reset":
+                    self.stopTimer();
+                    self.resetTimer();
+                    break;
             }
         }
     };
@@ -58,14 +67,7 @@
         return Entities.getEntityProperties(self.entityID, "position").position;
     };
     self.resetTimer = function() {
-        print("Stopping stopwatch");
-        if (self.tickInjector) {
-            self.tickInjector.stop();
-        }
-        if (self.tickIntervalID !== null) {
-            Script.clearInterval(self.tickIntervalID);
-            self.tickIntervalID = null;
-        }
+        print("Resetting stopwatch");
         Entities.editEntity(self.secondHandID, {
             localRotation: Quat.fromPitchYawRollDegrees(0, 0, 0),
             angularVelocity: { x: 0, y: 0, z: 0 },
@@ -74,7 +76,7 @@
             localRotation: Quat.fromPitchYawRollDegrees(0, 0, 0),
             angularVelocity: { x: 0, y: 0, z: 0 },
         });
-        self.isActive = false;
+        self.seconds = 0;
     };
     self.startTimer = function() {
         print("Starting stopwatch");
@@ -88,7 +90,6 @@
             self.tickInjector.restart();
         }
 
-        var seconds = 0;
         self.tickIntervalID = Script.setInterval(function() {
             if (self.tickInjector) {
                 self.tickInjector.setOptions({
@@ -97,15 +98,15 @@
                     loop: true
                 });
             }
-            seconds++;
+            self.seconds++;
             const degreesPerTick = -360 / 60;
             Entities.editEntity(self.secondHandID, {
-                localRotation: Quat.fromPitchYawRollDegrees(0, seconds * degreesPerTick, 0),
+                localRotation: Quat.fromPitchYawRollDegrees(0, self.seconds * degreesPerTick, 0),
             });
 
-            if (seconds % 60 == 0) {
+            if (self.seconds % 60 == 0) {
                 Entities.editEntity(self.minuteHandID, {
-                    localRotation: Quat.fromPitchYawRollDegrees(0, (seconds / 60) * degreesPerTick, 0),
+                    localRotation: Quat.fromPitchYawRollDegrees(0, (self.seconds / 60) * degreesPerTick, 0),
                 });
                 Audio.playSound(self.chimeSound, {
                     position: self.getStopwatchPosition(),
@@ -117,4 +118,15 @@
 
         self.isActive = true;
     };
+    self.stopTimer = function () {
+        print("Stopping stopwatch");
+        if (self.tickInjector) {
+            self.tickInjector.stop();
+        }
+        if (self.tickIntervalID !== null) {
+            Script.clearInterval(self.tickIntervalID);
+            self.tickIntervalID = null;
+        }
+        self.isActive = false;
+    };
 });
diff --git a/unpublishedScripts/marketplace/stopwatch/stopwatchClient.js b/unpublishedScripts/marketplace/stopwatch/stopwatchStartStop.js
similarity index 50%
rename from unpublishedScripts/marketplace/stopwatch/stopwatchClient.js
rename to unpublishedScripts/marketplace/stopwatch/stopwatchStartStop.js
index 6284b86102..88c037ee36 100644
--- a/unpublishedScripts/marketplace/stopwatch/stopwatchClient.js
+++ b/unpublishedScripts/marketplace/stopwatch/stopwatchStartStop.js
@@ -1,20 +1,21 @@
 //
-//  stopwatchServer.js
+//  stopwatchStartStop.js
 //
-//  Created by Ryan Huffman on 1/20/17.
+//  Created by David Rowe on 26 May 2017.
 //  Copyright 2017 High Fidelity, Inc.
 //
 //  Distributed under the Apache License, Version 2.0.
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
-(function() {
+(function () {
     var messageChannel;
-    this.preload = function(entityID) {
-        this.messageChannel = "STOPWATCH-" + entityID;
+    this.preload = function (entityID) {
+        var properties = Entities.getEntityProperties(entityID, "userData");
+        this.messageChannel = "STOPWATCH-" + JSON.parse(properties.userData).stopwatchID;
     };
     function click() {
-        Messages.sendMessage(this.messageChannel, 'click');
+        Messages.sendMessage(this.messageChannel, "startStop");
     }
     this.startNearTrigger = click;
     this.startFarTrigger = click;