We have a garmin also .. wife updates it at home on the computer every spring...and operates it as I have no idea how that electronic junk works for programming.
I stumble around on the computer but sometimes screw it up and she has to do the fix it so it works again. Admit I'm a computer neanderthal.
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.