A minute ago it was working fine, but then I tried to open it and it just shuts down like older versions do...What's up?

*Edit* Wierd, the only way I can open it is if I open torilaunch and select a replay other than the blank space.

*Edit again* Also when I click replays on the main menu toribash closes...

Anything in the error files? (stderr.txt) If Toribash encounters an error, it should print it to that text file.

Viruses, most probably... have you temporarily tried to move all replays in some other folder, uninstalling, reinstalling and starting the game again? It's doubtful but possible there's something funky in your replays folder...