If you got the SSL certificate through our client area, you can just delete the certificate from the control panel, and copy it from the client area later on.
There is no on/off switch for SSL because there isn’t really a point to it. Having an SSL certificate installed doesn’t prevent you from only making your website accessible on http://, and removing an SSL certificate doesn’t force all HTTPS traffic to HTTP. In fact, if you want to redirect HTTPS traffic to HTTP, you need a working SSL setup.
First I deleted the certificate and copied it to a file, but it is still in the client area so I didn’t really need the copy.
Then I removed the .htaccess where I was forcing all traffic to https.
This was fine.
Apparently all I needed to do was stop forcing traffic to https with the htaccess as Admin alluded to.