I was on a job and had a lot of tracks to record. After a few hours, I wanted to free some space, so we could keep recording. So I wanted to change directory and delete the files there. But I didn't and I deleted the files from the current session - without all of them being copied to my secondary card. At first I thought 'no problem, recovery software will do the trick', but unfortunately Zaxcom uses zax-files :-/ What can I do to restore my files?