so I haven't been on Toribash for about a year now, and I lost my old Toribash file. I had to redownload, logged in, and checked for my replays. and boom, every single replay I ever made is gone. Only default.

Did you mean lost/deleted the shortcut or the actual gamefolder? If it is the latter, check the bin. If it isn't there, I think it is irreversible without some kind of backup.

The gamefolder should by default be under C:\Games\ by default on windows, and I believe it has been there for at least a couple versions.
Also, replays from other versions than what you currently are using won't show up. If you want them to show up, you have to manually move them.

8VortexX8, allow me to clear this out for you.

If the issue is that your replays were saved in an older version of toribash you were playing in before you left and you want them now since you're back, then you should find them at this directory:

C: \Games\Toribash x.xx\replays
x.xx is your version. ex. 4.8 or 3.91

But, if you do not find the older version folder which is basically accidental deletion of the folder, I'm afraid there is absolutely no way for you to get your replays back.

Future tip, keep your replays updated or c/p and backup your current replays every now and then.