08-05-2013, 08:54 PM
Well... I'm unsure if there's a way you could do it right now. I'm assuming you've long closed the folder, so I guess the only thing you can do is manually rename them.
A tip for next time though: if you happen to accidentally rename files again, simply press CTRL + Z.
A tip for next time though: if you happen to accidentally rename files again, simply press CTRL + Z.