I think I have found out how you fix the engine bug in game ( not the new game, you still got to have the patch to start a new game ).
In the game, you go to options, and graphics, and dissable the " Lens Flare Effect ".
The boring thing is that you enemys dissapear after that you kill em', but the game is working.
Elwaren bug is still there, what you have to do is = start engine options and unable dirthering ( hope I have spell it right. . .), The crash will still be there, but by fire aroks fireball when exiting you can go, have worked for me once, and one time it worked to exit backwards, with the tail first. Hope it works for you to! =)