Spires of Delusion repeated crashes

Just tried to kill eradicator again after the patch, and the game crashed as soon as he threw his first spell. I haven't been able to clear him from my atlas for 3 days.

Boss not reappearing as others have mentioned

I would also like to report that I crashed 4 times upon entering the arena.

I was able to do the encounter by switching from Windowed fullscreen to fullscreen. for good measure i lowered my resolution a bit but it might not be necessary.

Now i've got to adjust gamma again cause switching full/windowed fs in this game messes up the colour settings something fierce.....