How can I change a form from https to http?

My client and I can't share administration of the forms that are https.  In the past, I could change from https to http at the "publish" screen.  Why can I not do this now?  

All of our forms are now using SSL which makes the form secure as well as transferring of data. It is the reason why the form URL has HTTPS on it by default.

In order to replace or remove the "S" in HTTPS, you need to copy the link first. After that, you can now paste it anywhere. You can now just remove the "S". 

Please note that forms not using HTTPS will not be able to fully utilize the SSL feature, which helps make your form to secure during the submission of the data.

Let us know if you need  any help. Thank you.