Well, the latest file (labeled combat fix in the OP) fixed most of the crashes, but not everything. First of all, it's a full redownload of the game as far as I can tell. There was one crash in the end game scene, but no others I found.
Unfortunately enemy sex combat is still completely broken for first 3 of the 4 combat areas. You can get hit with the various restraints and be knocked down fine (though the lack of any option to not do damage in combat makes it a pain, especially if you buy levels). After that I only had any advancement of the curse level in the first combat zone's boss fight once, buy dumb luck I somehow got a vibrator effect that increased "curse xp" but never actually advanced or leveling it up after filling the gauge. Then the enemies failed to knock the MC back down, so the mission ended before I could test any further on that run and I never got the vibrator effect again. The 2nd and 3rd areas never triggered any effect to level curse effects, and running out of HP / MP during knockdown did nothing at all.
The 4th area I had (once due to being higher level and the lack of a wait / block option) got knocked down, which gave some dialogue options that weren't translated, which led to tentacle sex scenes and increasing curse level.
