[Sniper85]

had the same problem here...here is what I did:

-uninstalled il-2 1946
-re-installed il-2 1946 (4.07)
-installed update 4.08
-did a back-up of the whole folder
-downloaded and installed UI 1.1
(see here: (The link is inoperative))
-install any extra mod 1 by 1.

that should do it.