Personally ... to work with a real site you are better off doing your own upgrades from the get Zen Cart link in the menubar at the top of your screen ...

Plus, being out of date because you are waiting for Fantastico to catch up is not a good idea ...

When we make releases, they include bug fixes, security fixes and additional features ...

It would make it much easier for you to see changes and adapt your site and overrides doing it yourself ...