I think that I would explore the 401K situation. Did he take the money out of the 401K before the divorce or after? I would have to ask if a portion of that would have been yours regardless since it was in place during the marriage. If so, I would be certainly questioning that situation and wanting my share of it. As for being going for unemployment, he best be careful if he's working for wifey. Someone could very easily turn him in for fraud.
Please take care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.