I used FileZila to upload this... zen-cart-v1.3.6-full-fileset-10272006 to my site in the FTD directory
I suppose you mean the "FTP" directory??

This needs to be in the web accessible directory - on Linuz this would be public_html or www - Determine your web dir and move all the files there...

Might as well also get Zen Cart 1.3.7 and start off with the most recent.