I have a Nuvi 3760 and have paid for lifetime updates for whole of Europe maps. Normally I copy the NTU Europe file from the Nuvi and then use this map in my Garmin Montana GPSr when going on holiday to find my way on foot round European cities.

Up to version CN Europe NTU 2015.30 unlocked and transferred fine to my Montana GPSr using Gimtools.

However with the latest CN Europe NTU 2015.40, the .img file would not transfer over to the Montana. It eventually worked using GarminUnlocker Alternativev8.0.1. Are Garmin putting more protection on these maps now ?