Physgun Skin Problem

A while back i got a reskin for my physgun. Now i want to delete it, but i dont know the name, the original file ( on ) is gone, and i dont know what folder i put it in ( as i am obviously nowhere near a master at this stuff ).

I tried installing a new reskin over that one in hopes it would replace the 1st reskin, and i could delete it, but now the 1st reskin one is not only there, but the beam is always white!

Halp!!! >_<