Just tried out 11e on my W7 machine (Home Premium 64bit from the factory). Didn't have any of the problems that have been reported here, but I did have to remove the installer version to get rid of the playlist bug. Everything is fine.
For future reference, how did you "remove the installer version"? Uninstalling it through Programs and Features? Or some other method?
And what were the symptoms you saw
before removing it?