This is an old thread but I wanted to follow up. Thanks for the advice to try Revo, it's a very cool program but unfortunately it couldn't get rid of fences either. It appears next to impossible to get this garbage off of my computer, at least with my knowledge set. I've tried everything, shutting down processes, then deleting the program files and registry settings, everything I know to try. And no matter what I do it either insists I can't delete it because it's in use, or recreates what I am able to delete.
And it's the ultimate infuriating catch 22. It insists I need the version that no longer exists to uninstall it, and if i try to install the new version with the hope that will help me to get it off, it tells me I can't install the new version until I uninstall the old version. What a giant joke.