http://bugs.winehq.org/show_bug.cgi?id=25535
--- Comment #14 from IvoAnjo knuckles@gmail.com 2011-01-06 14:23:51 CST --- The Garmin Map Updater application also needs .NET 4.0 -- doesn't even start up without it installed (I've tried with 3.X and mono, no luck there either).
Link: https://sites.google.com/site/knuckles/GarminMapUpdater_v2.5.16.exe.bz2