Hi @ultimatemembersupport,
Thank you for the quick response.
That option is already unchecked. The only effect checking that box has is to remove the “Register” link from the login page. However, if you navigate to mydomain.com/wp-login.php?action=register, it will still redirect you to Ultimate Member’s custom registration page.
I did find a solution though using another plugin called Redirection (https://redirection.me). I basically mapped “/wp-login.php?action=register” to an invalid page so anyone who tries to visit mydomain.com/wp-login.php?action=register will see a 404 error.
Thanks again!