I have sent you my save game through PM.
Now, this morning I did a fresh install of 2.5, and tried the same save game from 2.6 and it seemed to work just fine, no CTDs when clicking on that "infected" FM, or any other FM. Then I did a 2.6 patch, loaded the save game and I got a familiar CTD.
So, I guess it must have something to do with the stuff added through 2.6 patch. Is there a way that I can turn off Loyalty by myself?