I would ftp into your site and move the plugin folder “wp-maintenance-mode” into a different folder. Then your site should load up just fine. You may then need to contact the plugin creator directly to see if there is a compatibility issue or something.
are you logged in as an admin or editor? I’ve made the mistake at times of being logged in as a subscriber (for testing) and then when I go to the backend I can’t edit or see the posts/pages. Then I realize that I wasn’t logged in.
I would recommend logging out and logging back in, just to see if that was the problem.
unless the information has been changed, it should be located in the wp_usermeta table…if you have access to the register-plus.php file, look at line 1666, it says
$user_id = $wpdb->get_var( “SELECT user_id FROM $wpdb->usermeta WHERE meta_key = ’email_verify’ AND meta_value=’$verify_key'”);
look at where “usermeta” is listed…it will be the name of the table where the info is stored.