Wow! Worked great with my Garmin Nuvi 1490 LMT.
For .gcd file used :
[Only registered and activated users can see links. ]
the non MTK, 620 one.
Needed NO other software, other than GarminCure and PMPrepUSB.
Key was to hold top left corner with left hand and keep clicking on whatever prompts with my right. Updater even threw out an error message or two, but I just kept holding on, even when it seemed nothing was happening, clicked through the errors, and Updater installed and erased several things, after several minutes. When it finally said it was done, unplugged the GPS and it restarted!
Went to Garmin site and Garmin updated the rest. I do have LMT [ lifetime maps and traffic ] . I was ready to throw the GPS away. You [ everyone that made these software possible ] saved it!
Thanks a ton!!
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