My friend is trying to upload Atlantic basemap into GPSMAP 60Cx (US) MTK. But this way is not working. There are not any problem with device but it was updated with Alexander SW by crazy students from one of Russian supermarket. These crazy students did not know about this SW bug. It is not available to downgrade SW after flashing and so on. So if we are trying to use MapUpdater there are no success. MapUpdater display "Erasing..." message after launch but no process be performed.

SW is in attachment:
[Only registered and activated users can see links. ]

My friend use only BlueChart and without lake contour on basemap his device is not usable. Any suggestion?