      *  @playerversion AIR 2.5
      *  @productversion Flex 4.5
      */ 
-    protected function backKeyHandler(event:KeyboardEvent):void
+    protected function backKeyUpHandler(event:KeyboardEvent):void
     {
     }
     

     *  @playerversion AIR 2.5
     *  @productversion Flex 4.5
     */ 
    protected function restoreApplicationState():void
    {
    }
    

     * 
     *  <p>The persistence manager will automatically save and restore
     *  the main navigator's persistence stack if the
     *  <code>persistNavigatorState</code> flag is set to true. Data stored 
     *  in the persistence manager will automatically be flushed to disk 
     *  when the application is suspended or exited.</p>
     *  
