I recently installed this pack, it seemed too much for me and lagged Paint.net a lot. So I decided to delete it. I didn't know how to, so I just re-installed Paint.net, and then came back on it, and all of the effects are still there. I tried manually going into the Effects folder to delete them, but it just pops up saying I don't have permission to delete that file.I'm stuck with this and can't get back to normal Paint.net, HELP!