Hi copper,
On which system do you play the game? I have played the game several times and never had a crash.
I have to replay the game to that point to make the savegame you need.
Can I use the emailadress in your profile to send the savegame?
I will play the game direct to that point and make a savegame but you have to go back to some other parts to solve other puzzles in order to complete the game with all 4 endings.
Maybe you have already solve some of these puzzles.
If you want to know which puzzles, read the walkthrough on the website of Louis:
www.pcgameswalkthroughs.nl the , walkthrough is in Dutch but also in English.