How did you manage to get 1.0 to run? Can we get some details on what you did?
Or, if it ran fine for you with no adjustments, can you tell what operating system you have and roughly where you unpacked your game? (Which drive, behind how many folders total, etc., it's fine if you don't wanna say exact folder names)
I'm trying everything I can think of, but 1.0 just doesn't work for me, and I have quite a high-end PC so it can't be the specs.