"The Legend". Problems with the walkthrough.

I don't know if this is the right place to post, but I decided to play through the game again as a Mage and clear all territories of enemies. However, in Demonis, during the battle with the dragon (when you're heading to the "elevator" to the heavens and teleport to the top, there's a black one there... the game crashes during that battle. Not immediately. First, two enemy dragons and demons take their turns, then the demon (or whatever it's called), then my Mage attacks with a spell (twice), then uses Fury (black hole), then my Imp attacks, and after him, my Warrior attacks (either an Alchemist or an Archer, I'm not sure) - but when he attacks, the game crashes to the desktop.