yeah, see, here's the part where I make myself look like a fool.
I logged in to the shopping cart to see if there was a way to delete it or remove or whatever, but couldn't find that option anywhere. So I decided to try my luck at just removign the directory it was installed in. Of course, only some of the files got deleted, and the others couldn't be deleted.

So now, I can't even log back in to the shopping cart or anything. I feel like a total tard here....