Problem with wp-login.php

Hi there,

I just installed the plugin Rename wp-login.php to the end of my domain http://www.xxxxx.es/registro/. The problem has arisen because I also installed the plugin wp-mantenain to display a maintenance page while changes are made to the web. Trying to enter through the new login I get the maintenance page and not let me in.
Is there any way I can get in? or desistalar the plugin.

Thank you