Cdn Failure, How To Manually Disable?

I added an alternate CNAME (made a mistake) and the CDN has failed. That means when I go back to the CDN settings page, there is no button to save the changes (because it's trying to come from the CDN) so I can't remove the alternate CNAME.

So I either need to disable the CDN or remove the alternate CNAME setting, but can't use the admin panel to do it. Does anyone know where the setting is to do t manually?



'cdn' => true

change to false