I encountered a minor issue when installing FE Beta 4 for the first time.
When installing to a different drive besides C:, the shortcut in the Games folder for some reason tries to launch something from C:. This is despite the fact that the \ProgramData\Microsoft\Windows\GameExplorer\{guid}\PlayTasks\0\Play shortcut points to the right drive (F:) and that shortcut will run the game properly. Also the shortcut in Stardock Games from the Start Menu works fine.
I could not login from either shortcut that worked though. I added the /username and /password to the shortcut as suggested by the program and then it worked.
OS: Windows 7 x64
Note: It is possible that this problem is sort of caused by me. The complicating factor is that I have moved my UserProfile and some other normally-installed on C: locations from C: to F:. But this problem does not happen to any other recently-installed games when run from Games Explorer, so I doubt it.