I can confirm this freeze as well with my version , the readme says its version 1.05, I bought it right when it came out so it makes sense I have an earlier build I guess.
Will try a couple things and see if I can figure it out and get back to you.
Ok I also tried this out on my P90 with Dos6.22 and it actually crashes out after you kill the monster and gives some error codes which flash by as the computer resets.
Since it crashes both places im left thinking maybe it's a speed issue? It seems to me like a P90 would have been ideal for this game around that time though.
Maybe the game is just screwed. I did notice that you can sorta lead those slimes away by running back and then up. Maybe you can make it through just avoiding the slimes? Those things are a bitch to kill also.
I'll let you know if I get any further with this.
Update: Even with the game almost unplayably slow at 5000 cycles it still crashes. I don't know maybe there something wrong with the save but that seems unlikely to me.