I can't seem to get native or XY environment variables to work in the Admin.ini under both the [AccessControl] and [Paths] sections, it's no big deal for me to hard code the paths if its troublesome to fix but I just thought I'd make you aware, if indeed there is a problem because according to the help file it should work.
e.g. entries
- HiddenItems=%USERREAL%\Saved Games
- HiddenItems=%USERPROFILE%\Saved Games