Login page is no more customizable?

Hello,
Today I installed your plugin and created the new login page using a custom login URL.
Everything works very well but, unfortunately, I found that the login/registration pages were returned to the WP original condition, although they were customized before by using a Login Customizer plugin that used native wp-admin.php paths, of course.

The question is:
How can I have my old design of the login/registration pages or change the current design on my new login page?

It is not possible to assign a new login path to Login Customizer plugin to create a non-standard login page….
Thanks.