As we discussed in few threads lately, is no solution to add new campaign further than 43. Seems like this part is "a little bit" hardcoded. I took my chances and tried to make a new campaign for 43-45 and I managed once to click on the new campaign but resulted in a ctd. Since then I never managed to pass a persistent error that will occur every time I start a new game:
The only solution now is to extend Black May and add new missions and objectives. Doing so, I managed to play until June 4 when sudden the game ended. I don't know why this happened... is again the hardcode part that block any progress after a certain date, or is because I played the campaign using an old save. Now I restarted the BM campaign just to see if I can pass that date an enter July, but this takes a lot of time even on max TC :/