File corrupted while saving

I had a bigger file opened through my network from my NAS. It worked fine. But while saving it froze. I ended the process and restarted Keyshot. Now I have the main file named like abcd.bip.tmp1. Beside the main file I have the last 2 revisions abcd.bip.223 and abcd.bip.224.
My first attempt,pt to rescue the file was making a copy of the corrupted file (abcd.bip.tmp1.) and renaming it to abcd.bip. This gave me an error message while trying to open it in Keyshot.
I found out that It is possible to use one of the revisions and renaming it by removing the revision number. But I didnt see this approach in the manual. https://manual.keyshot.com/manual/models-tab/revision-manager/ There it is only described to open the old revision through the revision manager. But thats not possible when the saved main file is corrupted.
So this is for the record in case someone else runs into this problem