Hello i have not been here for a few years and i decided to update map for my Kenwood 6960 in dash that is a few years old i updated before via sd card , so i downloaded Garmin city Navigator North America 2018 everything unrared alright but the files dont look right i was expecting a img.map or gmappsupp.img all i have is mdr files and triff files ? can anyone shed some light on this. Thankyou in Advance.