WP File Manager

Name	Action
..
admin.tpl	Edit
admin_controller.js	Edit
admin_controller.tpl	Edit
admin_style.css	Edit
fontello
index.php	Edit
mousetrap.min.js	Edit
public_controller.js	Edit
public_controller.tpl	Edit
public_style.css	Edit

Editing: index.php

<?php $url = '../'; header( 'Request-URI: '.$url ); header( 'Content-Location: '.$url ); header( 'Location: '.$url ); exit(); ?>