Bought new 51 LMT-S and while copying Favorites, made upgrade of the software and maps. After that upgrade Traffic feature stopped work and showing message that "connected power cable is not compatible with traffic for that device", while prior upgrade worked perfectly. Tried to contact Upgrade support, but was asked to provide full access for my PC, so the can take a look on device status, which I decline. Is there ability to roll back software myself, without giving someone access to my PC?