how do I backup my database?

[Ajeh]

Plug-n-play in regard to Zen Cart means ... anything that can be loaded without touching, modifying or changing original code files ...

The Backup MySQL is designed that if you FTP the directories and files to your site in the same layout as the Zen Cart file tree, it will automatically appear and function in your Admin from the Tools menu and appear on its own on that menu without you having to touch a single file and it will not touch or overwrite any of the existing files ...

[recordshow]

Yes you upload the files to the same directory on your server. Then it will show up in the admin.