BaseCamp takes some getting used to but once you master it, you can do a lot of useful things.
If you download and install the Gmap folder (Mapsource Version) of your map you can view the map without the Gps plugged in to the computer.
I like the plugin for google earth specially.
I think you cannot directly edit or delete Favourites because the Favourites are stored in the NVRAM of the unit.
Current.GPX is actually a sort of a "shadow file" that contains the points and tracks from NVRAM.
Calling it "stupid" I don't really agree.