Well, I'm royally pissed off right now. I decided to resume an old map that I last did anything with about a year ago. It was the only map I'd ever made that stood any chance of being completed. It was a remake of an old TWHL map, so my weakest points, general level design and concept were already taken care of. I found the rmf, but it seems to have reverted to an old version where only a bit of one room is completed. I can't seem to find any more complete versions, but I will keep looking.
Not really any journal worthy content, I just needed to let of some steam. I'm not too happy at the moment.
Once you do rename them to extension RMF.
But I always make a manual backup copy of the VMF every single time I have a successful compile.
And for back ups, you can zip em with 7zip, since it compresses as if its winrar on steroids.