Membership Registration can be disabled for each page separately by clicking PAGES.
In the left pane, select the page you want to make available to all visitors. Password protection is turned off by clicking Restrict access to page. If the button is blue, the service is active. If the button is grey, the service is disabled.
If you wish to disable password protection completely in order to make your entire website available to all website visitors, click Settings.
In the Website Settings tab, click Enable Membership registration.