It's recovery data, gathered automatically and it's stored in wherever you set your temp location to. Audition decides whether you need to recover data - users don't get to choose about that. Recovery data is lost when you restart Audition after a normal shut-down; it only does recovery from crashes.
It has also recently been discovered that if you recover from a crash, that you need to re-establish where you are recording new files to - otherwise they end up in the temp recovery area, not saved properly, and you will lose everything you recorded next time you restart. The devs are attending to this, apparently!