We have a working eCommerce site running Zen Cart 1.39d and need to upgrade it to 1.50 current version. I want to maintain the same look and functions. The bidder needs to be able to backup the complete site so we do not lose customers or products. They must have a very good and complete understanding of Zen Cart and have experience in the upgrade process and all zen cart functions. Site is hosted on a web hosting server that is not ours, but we have FTP access to it. This site is also running a…