public byte[] load_licence(Options option) {
   /*        Preferences prefs = Preferences.userNodeForPackage(this.getClass());
           return prefs.getByteArray("licence."+ option.getHostname(),null);
   */
   Storage store = Storage.getLocalStorageIfSupported();
   if (store != null) {
     return store.getItem("licence." + option.getHostname()).getBytes();
   } else return null;
 }
 public void save_licence(byte[] databytes, Options option) {
   /*        Preferences prefs = Preferences.userNodeForPackage(this.getClass());
           prefs.putByteArray("licence."+ option.getHostname(), databytes);
   */ Storage store = Storage.getLocalStorageIfSupported();
   if (store != null) store.setItem("licence." + option.getHostname(), new String(databytes));
 }