Zen Cart Upgrades
Ah, the wish for automatic upgrades! Sorry, folks, no such thing yet!
If you have used an automatic installer for Zen Cart, your hosting will tell you when it's time to upgrade. STOP! Don't click that button!
Have you installed any mods or made any changes to the original install? There's a very good possibility that automatic upgrade is going wipe out some or all of your changes. That's why we do Zen Cart site evaluations first. We find out what changes have been made and get the cart ready for upgrades. We find out what mods are going to have to be re-installed or that may no longer work before we touch anything.
There are presently 2 stable versions: Zen Cart 1.5.5f and 1.5.6c. Which version depends on the website and the owner's wishes.