first try to remove your iGO v8.3.2.92111 because this soft nav isn't the ******* one, sou you can't change to another map.
Then you put another iGO (******* one) to the previous folder (MobileNavigator) and then you rename iGO.exe to MobileNavigator.exe.
BEFORE YOU DO THESE YOU HAVE TO MAKE BACKUP COPY FOR YOUR MobileNavigator 8.3.2.92111.
Good Luck!
Bookmarks