Can't disable Topic'it

Today I discovered that I'm unable to disable Topic'it. The options are there in the administration panel like they always have been but when I select "no" for everything and click "save" instead of saving the choices it loads to a blank page. I have to go back to my forum and back to the admin panel where the choices aren't saved. What's wrong with the admin panel? And is there an alternative way to disable topic'it? If I can't I might have to delete this particular ...