Ah, sorry. I thought you'd said you'd uninstalled 2.0 Beta 13, which would have definitely removed the USB drivers. You didn't mention doing the hand-installation of the 2.0 final USB drivers as described in the release notes, so that's why I brought up the FAQ entry.

I missed the part that said you'd reinstalled 2.0 Beta 13 and it still didn't work. That should have clued me in on cabling problems.