The new 2.0 final will (for the first time ) properly install over Beta 13 without complaining, so go ahead and do that. I think it'll be OK.

Why the deinstaller is doing that network-drive thingy is beyond me. It's all FM if you ask me. Those newfangled MSI installer packages are a complete PITA, I hate them with a passion. I recently found a bunch of crap left over from those things in my Windows directory, many megs worth of stuff that I just frickin' deleted, made me so mad.