title: Error when starting the simulator after moving project to new computer
body: <p>I just moved my Codenameone Project within Eclipse to a new MacBook. When I start the simulator now there is an error shown in the console of eclipse. As a result, new installed skins will not be stored and are gone at the next start of the simulator.</p>
  
  <p>Here is the stack trace of the error. Do you have any idea, what the reason could be? Maybe there are some pathes stored that don't match on the new MacBook?</p>
  
  <pre><code>java.util.prefs.BackingStoreException: Synchronization failed for node '/com/codename1/impl/javase/'
      at java.util.prefs.MacOSXPreferences.flush(MacOSXPreferences.java:226)
      at com.codename1.impl.javase.JavaSEPort.addSkinName(JavaSEPort.java:3425)
      at com.codename1.impl.javase.JavaSEPort.loadSkinFile(JavaSEPort.java:3517)
      at com.codename1.impl.javase.JavaSEPort.init(JavaSEPort.java:3673)
      at com.codename1.impl.CodenameOneImplementation.initImpl(CodenameOneImplementation.java:169)
      at com.codename1.ui.Display.init(Display.java:478)
      at com.codename1.impl.javase.Executor$1.run(Executor.java:112)
      at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
      at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:749)
      at java.awt.EventQueue.access$500(EventQueue.java:97)
      at java.awt.EventQueue$3.run(EventQueue.java:702)
      at java.awt.EventQueue$3.run(EventQueue.java:696)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
      at java.awt.EventQueue.dispatchEvent(EventQueue.java:719)
      at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
      at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
      at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
  </code></pre>