The only 1.28 version I COULD MAYBE use is the one in the Downloads thread.
Using tat one would mean losing over a month of fixes, adjustments, improvements, new additions, etc.
Not an option, especially since it is a chapter causing most trouble, not the campaign itself.
This is the current situation:
I created a separate campaign file that I worked on with the PTR. The editor did not crash anymore.
However, Chapter Fourteen A crashes seemingly randomly.
I will try to figure out why, but I feel it is the patch, meaning I cannot do anything.
If this cannot be fixed with the next full patch, I might wrap up the story another way until it got fixed.