Ironman saves are encrypted, for obvious reasons, and cannot be edited or rescued in any way, I'm sorry.
When you start the game after such a crash, the game will want to send in a crash report. Did you OK that? If so the crash dump and info are in the hands of the developers and there's nothing more you need to do to get it looked at.
I'd just put that save aside, and try it as each new patch is released.
Sorry for that problem!