diff --git a/interface/resources/qml/dialogs/FileDialog.qml b/interface/resources/qml/dialogs/FileDialog.qml
index ba5e162391..4eea3566b8 100644
--- a/interface/resources/qml/dialogs/FileDialog.qml
+++ b/interface/resources/qml/dialogs/FileDialog.qml
@@ -9,7 +9,7 @@
 //
 
 import QtQuick 2.7
-import Qt.labs.folderlistmodel 2.1
+import Qt.labs.folderlistmodel 2.2
 import Qt.labs.settings 1.0
 import QtQuick.Dialogs 1.2 as OriginalDialogs
 import QtQuick.Controls 1.4 as QQC1
@@ -320,6 +320,7 @@ ModalWindow {
         FolderListModel {
             id: folderListModel
             nameFilters: selectionType.currentFilter
+            caseSensitive: false
             showDirsFirst: true
             showDotAndDotDot: false
             showFiles: !root.selectDirectory
diff --git a/interface/resources/qml/dialogs/TabletFileDialog.qml b/interface/resources/qml/dialogs/TabletFileDialog.qml
index 6c4e32dc5a..5bcc42f101 100644
--- a/interface/resources/qml/dialogs/TabletFileDialog.qml
+++ b/interface/resources/qml/dialogs/TabletFileDialog.qml
@@ -9,7 +9,7 @@
 //
 
 import QtQuick 2.7
-import Qt.labs.folderlistmodel 2.1
+import Qt.labs.folderlistmodel 2.2
 import Qt.labs.settings 1.0
 import QtQuick.Dialogs 1.2 as OriginalDialogs
 import QtQuick.Controls 1.4 as QQC1
@@ -285,6 +285,7 @@ TabletModalWindow {
         FolderListModel {
             id: folderListModel
             nameFilters: selectionType.currentFilter
+            caseSensitive: false
             showDirsFirst: true
             showDotAndDotDot: false
             showFiles: !root.selectDirectory
diff --git a/interface/resources/qml/hifi/tablet/tabletWindows/TabletFileDialog.qml b/interface/resources/qml/hifi/tablet/tabletWindows/TabletFileDialog.qml
index a27c7b59dc..36a37134bf 100644
--- a/interface/resources/qml/hifi/tablet/tabletWindows/TabletFileDialog.qml
+++ b/interface/resources/qml/hifi/tablet/tabletWindows/TabletFileDialog.qml
@@ -9,7 +9,7 @@
 //
 
 import QtQuick 2.7
-import Qt.labs.folderlistmodel 2.1
+import Qt.labs.folderlistmodel 2.2
 import Qt.labs.settings 1.0
 import QtQuick.Dialogs 1.2 as OriginalDialogs
 import QtQuick.Controls 1.4 as QQC1
@@ -279,6 +279,7 @@ Rectangle {
         FolderListModel {
             id: folderListModel
             nameFilters: selectionType.currentFilter
+            caseSensitive: false
             showDirsFirst: true
             showDotAndDotDot: false
             showFiles: !root.selectDirectory
diff --git a/interface/src/avatar/AvatarDoctor.cpp b/interface/src/avatar/AvatarDoctor.cpp
index 43e50ea049..01a40e89fd 100644
--- a/interface/src/avatar/AvatarDoctor.cpp
+++ b/interface/src/avatar/AvatarDoctor.cpp
@@ -92,7 +92,7 @@ void AvatarDoctor::startDiagnosing() {
         _model = resource;
         const auto model = resource.data();
         const auto avatarModel = resource.data()->getHFMModel();
-        if (!avatarModel.originalURL.endsWith(".fbx")) {
+        if (!avatarModel.originalURL.toLower().endsWith(".fbx")) {
             addError("Unsupported avatar model format.", "unsupported-format");
             emit complete(getErrors());
             return;