WP Ghost uses path rewrite rules to let you customize the old paths without physically changing them.

It also allows you to disable access to the old paths for hackers and protect the WordPress plugins and themes.

All these changes will not affect the WordPress directory structure through FTP and it will not break it when you deactivate the WP Ghost plugin.

It looks like a simple plugin but it’s a complex system behind it and a good firewall against Script Injection and Brute Force attacks.