[Hoghead]

Then install 4.10.1 again and see if the start up loading screen shows 4.10.1 instead of 4.11.1 another possibility of verifying it?
Can there be 2 different install of IL 1946 on the same drive but separate folders, one with Ultra Pack 3, ( 4.10.1) and the other HSFX (4.11.1)