Maintenance Mode by IP address plugin version 3 comes with an easy and secure method to re-gain access to your site in case that you forgot to add your IP address to the allowed IP list. 


Visit http://yoursite.com/wp-admin/admin.php?page=rc-mmip&disablemmipmode to disable the maintenance mode.   


Please note: this will only work if you are an administrator. 


If you still have questions, please feel free to open a support ticket.