None that I can think of.
I suppose if you find an earlier patch you could simply run that. It might patch-backward all of the files involved. But even then, there would be no way to get back to the disk original version without having a copy of that version.
This game is NOT suitable for students, interns, apprentices, or anyone else who is expected to pass tests on a regular basis. Do not think about strategies while operating heavy machinery. Before beginning this game make arrangements for someone to check on you daily. If you find that your game has continued for more than 36 hours straight then you should consult a physician immediately (Do NOT show him the game!)