so i tried going windowed mode. i did 3-4 sessions. what i did was booted the game in a window instead of fullscreen. i just chose a model and let an H animation play for a few minutes on it's own while i played games on my console. i switched model and map throughout maybe 2 hours in each session. the giant subtitles never appeared and the game didn't seem to crash. only once did it lock up in a white loading screen, but that seems to be more the norm. didn't have any crash-to-desktops. i mean...what did i learn from this? beats me. this game is just being weird. for now i'm playing in an window just to make sure it doesn't crash again. what i would like to know is if there is a mod to have the window be borderless or to change the window bar on top. it's plain white. :/
So let me summarize: you´ve had a well working R11.
By upgrading to R12 things got worse, even a clean new install didn´t improve significantly.
Well, I normally playing 1600x900 windowed, but didn´t recognize any performance change in R12 (I will test Full HD fullscreen next days to compare).
So far can´t imagine what may cause a performance issue in R12.
Can u share a screenshot from your game folder (explorer)?
Did u run Registry_Fixer.bat?
Can u share an overview of you hardware?