I won a GUI Header in a tourney, and ever since I activated it, I cannot deactivate it.
I currently have it on the market, but it still plagues my Toribash Menu!
How can I deactivate it?

Go to activated (Above deactivated) and click deactivate.

If doesnt work take it off the market then try again.

Delete all of the files in your custom folder.
(C: \Games\Toribash-4.1\custom\Omiwom)

Dont hes lieing

Troll much?

Yes I was apprehensive about doing that. Your advice didn't work, Tic.

Really, try it again or try what Albus said.

Delete your custom folder where you installed toribash or

Take it out from the market deactivate it then add it to the market

Its a website bug.

I actually just waited a few hours and tried again and it worked fine. If that doesn't work delete your custom folder. If you don't know how to do that. Here you go.

If you're on windows operating system go to computer, select your storage device that toribash is installed on. Go to your games folder. Select your version of toribash (if any others). Go to customs folder, Search for your Tori and delete your tori's folder. If this doesn't work here's a final Option. Shoot a PM to an Admin.

Are you an idiot? That's what he is supposed to do to fix it.