Same issue for me. i went from 17th back too 11th. I am wondering when i can have a refund? i havent even wanted to waste my time seeing if the fix i was looking for in the new build was fixed, since i cant play my current game which is many more hours in than these much older saves.
i was looking for the western island crash to be fixed.
This is just sad. and im not kidding about the money back thing.