The
You must be registered to see the links
does say "1.9.1", right?
You mentioned having tried updating AAU. Have you tried the "other side" of this equation, the card? Namely: get the editor to crash on saving a card, then re-create the character and start stripping "parts". Remove all modules from it -> try to save. If it fails - re-create a character with nothing but built-in features (no custom clothes, no custom poses, no "lemme enable every single trait"). The goal is to isolate the problem to a mod/card/whatever; heck - load one of the default cards the game came with, change something - say, virtue - and try to save it afterwards. If even a fully vanilla config crashes, well...ouch. I would be wiping the game at that point and reinstalling everything from scratch. And if it works - ouch, because you would have to keep testing to find the custom content that breaks the editor.
Typical troubleshooting: strip everything but bare necessities -> check if working -> if it is, add the pieces one by one until the thing fails again -> congrats, you found the problem.