That's only the case for your US/EU Version GPSMAP 62s [HWID 1340] without MSV [Map Signature Verification] presently, many outdoor units now have higher protection including some 62s Asian models [i.e. JN, TWN, CH & SEA] which already have MSV in their firmware. Refer to this thread and you'll understand why we suggest using only the version of gimgunlock with the map signature patch: [Only registered and activated users can see links. ], Post #4 for the full explanation and Post 41# for a nice summary. If a unit doesn't yet have MSV or GSV protection in it's loaded fw then original gimgunlock will work but it's only a matter of time before all update versions of fw for popular models will have both MVS [either 'weak' or 'strong'] and GSV protection or one of them added and no 'eureka' moment then sorry.

This is certainly the right thread to ask about the relative superiority of earlier versions to V4. I'll let the locals answer that one.