Handle db upgrades and prepare work for old profiles deprecation.

app/qml/ApplicationSettings.qml

@@ -24,7 +24,9 @@ import QtQuick.Controls 1.0
 import "utils.js" as Utils
 
 QtObject{
-    property string version: "1.0.1"
+    readonly property string version: "1.0.1"
+    readonly property int profileVersion: 2
+
 
     // STATIC CONSTANTS ////////////////////////////////////////////////////////
 
@@ -109,6 +111,8 @@ QtObject{
 
     signal initializedSettings()
 
+    signal showErrorMessage(string message)
+
     property Loader fontManager: Loader{
         states: [
             State { when: rasterization == no_rasterization
@@ -331,6 +335,17 @@ QtObject{
         burnInQuality = settings.burnInQuality !== undefined ? settings.burnInQuality : burnInQuality;
     }
 
+    function userLoadProfileString(profileString) {
+        var profile = JSON.parse(profileString);
+        var version = profile.version !== undefined ? profile.version : 1;
+
+        if (version === profileVersion) {
+            loadProfileString(profileString);
+        } else {
+            showErrorMessage("This profile is not supported on this version of CRT.")
+        }
+    }
+
     function loadProfileString(profileString){
         var settings = JSON.parse(profileString);