Hi and thanks for dropping in to Catalook Support - It's a community based support site for the shopping cart product which has been around since 2004.
The forums are generously supported by other users of the Catalook store product and as the owner of this site, we try to answer questions as often as possible, but sometimes it's not as fast as we'd like, due to the work commitments at XD.
This is a site that started off as a 3.1.1 build and has been upgraded over time. This is a testament on the module developers and how DotNetNuke has grown over the years. If you take the time to learn this great product, you can have a robust, reliable store, that just keeps on going.
You know, we have some clients who have run with this store product since early 2005, on DNN 3 builds that have been upgraded. This is a great product to ensure the integrity of your build is able to remain upon upgrading.