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Concerns about upgrading to wm5
I just purchased my first gps, a garmin que 1620 that should get here in a couple of days and before I upgrade I want to be sure that it will work with my x50v with wm5. Their site doesn't mention anything about it so I am hesitant to upgrade. If I do upgrade and it doesn't work is it possible to go back to wm2003?
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