campaign difficulty setting issue

[Flanker1985]

Hi guys, I have just upgraded my game into v4.11. And I have copied all of my campaign record as well. But since the introduction of new difficult setting, it switched my "realistic setting" into "custom". If you are an expert on computer or modding, please help, I just want all my campaign back to realistic again, and I don't really want to play it from begginning again since I am already at the Kursk. It is going to take monthes to replay. :'(
Thanks a lot.