Bringing this back because I think I'm in the same situation now. Every time I load my current save, I can only play for about 1 in-game day before the game crashes. No matter what I do or where I go, I can't avoid the crash. Since my conspiracy level is 1960/2000, I have to assume this is a big factor in the crash.
If there's currently no way to fix the crash itself, is there at least a way to delete the related quests from the log, or else mark them as finished? My last backup save is from a day or so ago, so I'd lose a huge amount of progress if I went back. (And I'd still have the same issue waiting for me, if the conspiracy quest is indeed the thing making me crash...)