The "live demo" link on https://www.zen-cart.com/downloads.php?do=file&id=1744 points to http://zenlyzen.com/responsive/index...sheffield_blue which is the demo link associated with RSB1.1. Since this demo no longer represents the latest version of RSB, I suggest updating the link to the RSB2.0 version http://zenlyzen.com/mobile-friendly-...sheffield_blue.