Reset the device to factory settings Menu > Ctrl. panel > Settings > General > Factory Settings > Enter lock code. Default Lock code is 12345. Try to upgrade again.

There are two ways to upgrade:

  1. Start Traveler (Psiloc World Traveler) application  > select Options > Plug-in manager > World Traveler update > Check for updates.
  2. Download the correct version from http://www.worldtraveler.biz/download.html  and install it over the existing one.