If you use the normal screenshot button, you need to go to paint after making it and press ctrl+v , then you can save the file to where ever you want.
If you saved using toribash f8 button they are in either;
Steam version: C/program files 86 (this is probably a different number, I'm just guessing it) / steam / steamapps / common / toribash / screenshots.
Or non-steam
C/ games / toribash/ screenshots.
Maybe the screenshots folder is inside some other folder but I believe not, haven't used it in a while.