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GPSMAP 66S - Getting message "Garmin Express doesn't support this device. Please use Garmin Map Updater". Map Updater doesn't work. What do I do now?

LHouseman
over 2 years ago

GPSMAP 66S - Getting message "Garmin Express doesn't support this device.  Please use Garmin Map Updater".  Map Updater doesn't work.  What do I do now?