[Ghost]

The campaign files are stored in Sturmovik1946/Missions/Campaign/De (for German campaigns). I guess the same order of files was used in previous versions of the game as well. In there you should see a folder named after your current campaign, just copy it into the appropriate folder in Sturmovik 1946 and it should work. I think you also need to create a pilot with the same name as in that campaign in order to play it, but I'm not sure..