diff --git a/interface/src/scripting/WindowScriptingInterface.cpp b/interface/src/scripting/WindowScriptingInterface.cpp
index 277989439c..4cfa68b0f5 100644
--- a/interface/src/scripting/WindowScriptingInterface.cpp
+++ b/interface/src/scripting/WindowScriptingInterface.cpp
@@ -264,6 +264,10 @@ void WindowScriptingInterface::showAssetServer(const QString& upload) {
     QMetaObject::invokeMethod(qApp, "showAssetServerWidget", Qt::QueuedConnection, Q_ARG(QString, upload));
 }
 
+int WindowScriptingInterface::checkVersion() {
+    return QCoreApplication::applicationVersion().toInt();
+}
+
 int WindowScriptingInterface::getInnerWidth() {
     return qApp->getWindow()->geometry().width();
 }
diff --git a/interface/src/scripting/WindowScriptingInterface.h b/interface/src/scripting/WindowScriptingInterface.h
index 28f1bafa5d..0e1f156b27 100644
--- a/interface/src/scripting/WindowScriptingInterface.h
+++ b/interface/src/scripting/WindowScriptingInterface.h
@@ -58,6 +58,7 @@ public slots:
     QScriptValue save(const QString& title = "", const QString& directory = "",  const QString& nameFilter = "");
     QScriptValue browseAssets(const QString& title = "", const QString& directory = "", const QString& nameFilter = "");
     void showAssetServer(const QString& upload = "");
+    int checkVersion();
     void copyToClipboard(const QString& text);
     void takeSnapshot(bool notify = true, bool includeAnimated = false, float aspectRatio = 0.0f);
     void takeSecondaryCameraSnapshot();
diff --git a/unpublishedScripts/marketplace/blocks/blocksApp.js b/unpublishedScripts/marketplace/blocks/blocksApp.js
index 6a48cdc101..f8994d5c3d 100644
--- a/unpublishedScripts/marketplace/blocks/blocksApp.js
+++ b/unpublishedScripts/marketplace/blocks/blocksApp.js
@@ -1,8 +1,29 @@
-(function() {
+///
+/// blocksApp.js
+/// A tablet app for downloading 3D assets from Google Blocks
+/// 
+/// Author: Elisa Lupin-Jimenez
+/// Copyright High Fidelity 2017
+///
+/// Licensed under the Apache 2.0 License
+/// See accompanying license file or http://apache.org/
+///
+/// All assets are under CC Attribution Non-Commerical
+/// http://creativecommons.org/licenses/
+///
+
+(function () {
 	var APP_NAME = "BLOCKS";
 	var APP_URL = "https://vr.google.com/objects/";
 	var APP_ICON = "https://hifi-content.s3.amazonaws.com/elisalj/blocks/blocks-i.svg";
 
+    try {
+        print("Current Interface version: " + Script.checkVersion());
+    } catch(err) {
+        print("Outdated Interface version does not support Blocks");
+        APP_URL = null;
+    }
+
 	var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");
 	var button = tablet.addButton({
 		icon: APP_ICON,