Changing the default registration page

We are customizing our registration page using the ProfileBuilder Pro plugin.
By default, when a user clicks on the “register now” link, the WP redirects to /user-registration page.
Even if I delete this page from WP, the system recreates the same page when the user clicks on “register now” button.
As we are working on a new registration page made with ProfileBuilder Pro plugin, we need to change this default /user-registration to our own page.
Even if we put our code in the default /user-registration page, the system overwrites our code and shows the default registration page from the theme.
How can I do this?
How can we disable or change the default registration page from the theme to our own registration page?