Where is the editor? Where are the privacy settings in the editor? Is this a free option? Is this a paid option? How much is it?
I looked at all of the settings on the project and I did not see anything. I looked at the main menu and did not see anything.
Sorry for the confusion!
As far as making changes in the editor goes, you this help center article will walk you through where to find the editor settings.
The editor itself is what we call the screen displayed where you can make changes to your code, typically called a code editor, but we abbreviated to just call it the editor.
For privacy settings, you do have to be a Glitch Pro user, and if you are interested, this article on Private Projects walks you through how to make that change. You can find more information on Glitch Pro here.