Handle db upgrades and prepare work for old profiles deprecation.

app/qml/Storage.qml

@@ -23,9 +23,20 @@ import QtQuick.LocalStorage 2.0
 
 QtObject {
     property bool initialized: false
+    property string dbVersion: "1.1"
 
     function getDatabase() {
-         return LocalStorage.openDatabaseSync("coolretroterm", "1.0", "StorageDatabase", 100000);
+        try {
+            return _getDatabase(dbVersion);
+        } catch (error) {
+            console.log("Error while reading from settings database:", error);
+            updateAndResetDatabase(_getDatabase(""));
+            return _getDatabase(dbVersion);
+        }
+    }
+
+    function _getDatabase(version) {
+        return LocalStorage.openDatabaseSync("coolretroterm", version, "StorageDatabase", 100000);
     }
 
     function initialize() {
@@ -74,9 +85,22 @@ QtObject {
 
     function dropSettings(){
         var db = getDatabase();
+        dropSettingsFromDB(db);
+    }
+
+    function updateAndResetDatabase(db) {
+        console.log("Updating and resetting database.");
+        db.changeVersion(db.version, dbVersion);
+
+        try {
+            dropSettingsFromDB(db);
+        } catch (error) {}
+    }
+
+    function dropSettingsFromDB(db) {
         db.transaction(
             function(tx) {
                 tx.executeSql('DROP TABLE settings');
-          });
+        });
     }
 }