As thats an MB file format thats gonna suck trying to get an ounce of info back from it, had that been an MA file chances are that would have recovered because they store more info.

I had this happen years back on both accounts.

for the record, I learned from a colleague of mine who came from Weta that an MA file is a good way of saving scene files that have issues, they are bigger files but they tend to clear out the crap, kind of like an obj but dont strip out everything important you'll need.

just my ten pence of useless info

Jay