This is a really old story, most of us have gone through it:

I made an awesome replay, but ran out of frames.

normally this wouldn't be a problem, I'd just open the replay in notepad, change the 500 frames into 1000 and save it as "*cool replay* padhack.tbm", finish the replay, save it as the original name and delete the padhack backup.

but now that I saved it as padhack.tbm, it won't show up in the replays list and instead of "toribash replay" as the file type, it says "TBM file".