It works for me, just tried it, not much use to you though I know. Have you tried using an ftp client instead of the file manager? http://filezilla-project.org/download.php
Very easy to use, instructions here - [TUTORIAL] How to FTP to the 000Webhost Servers
Edit: Still not sure what you mean by "download images to your site" You can upload to your site or download to your own pc.