I have a PC as well, but when i try running the un.bat a cmd window just blinks on and off on the screen and quits on its own. not sure if it altered anything to the gmap folder.
Even on my PC, after inputting device ID and mapid into jetmouse, the key generated unlocks the map for use in mapsource, but it remains locked whenever i run Mapinstall.
not really sure why this is happening