First, try lowering the resolution to the minimum. I started experiencing crashes when selecting a map at FHD.
I had one save file that constantly crashed. Strangely enough, a simple solution helped. I launched the game in compatibility mode for my Windows version. Try it, just in case...
Thank you, I set compatibility with Windows 7 in the shortcut and lowered the desktop resolution to 800x600, but it didn't help.
I had the same issue with the licensed version.
Installing the latest version of the video card drivers from amd.com (beta from the end of September) helped.
I reinstalled the beta from 09-30, but it didn't help.
It still throws me back to the desktop, but the boss appeared. Sometimes, when it crashes, a window with information about insufficient memory appears... but I have 4 GB of RAM.
P.S. Thanks to everyone! I accidentally tried launching the 32-bit version, and it worked! I'm playing now. It still crashes frequently