Index: sources/model/settings/MSettings.cpp
===================================================================
diff -u -r79a6cfcb10472261f3ec26eaf0baf6f1245cd311 -ra82ee4f326b26c4369f1306f867edc1bca6dabbe
--- sources/model/settings/MSettings.cpp	(.../MSettings.cpp)	(revision 79a6cfcb10472261f3ec26eaf0baf6f1245cd311)
+++ sources/model/settings/MSettings.cpp	(.../MSettings.cpp)	(revision a82ee4f326b26c4369f1306f867edc1bca6dabbe)
@@ -144,8 +144,14 @@
     KeyValue mGroup = _settings[vGroup];
     if ( mGroup.location != vLocation ) mGroup.location  = vLocation;
     if ( mGroup.category != vCategory ) mGroup.category  = vCategory;
-    mGroup.keys      += vKey     ;
-    mGroup.values    += vValue   ;
+    if ( mGroup.keys.contains(vKey)) {
+        int index = mGroup.keys.indexOf(vKey);
+        mGroup.values[index] = vValue;
+    }
+    else {
+        mGroup.keys      += vKey     ;
+        mGroup.values    += vValue   ;
+    }
     _settings[vGroup] = mGroup;
 }