[propbeanie]

Did you use MultiSH4 in the Steam game folder, and set the Save folder to something different from your disk install? It almost sounds like either your mod was trashed by windows (what is the path to your Steam Library folder on that K: drive? Just "Steam Library \Silent Hunter... " ?? No "Program Files", correct? You might also have had a "Steam verify of game files", where Steam changed the modded game back to Stock on you, which would not be compatible with a previous Save in a modded game... If both installs (disk & Steam) are using the same Save folder (C:\Users \UserName \Documents \SH4), then that is the trouble. You cannot do that.