I have an online store built on Ubercart where I sell downloadable zip-files as products. These files are associated to the product by the "Features" option. I'd like to build an admin view to list every product and its associated file, but this view only shows png or pdf files, while zip files remain hidden.

I have been checking in the settings but don't find any place where I can add zip files as allowed files for my site.

On the other hand, zip files are located in a private directory.

Any hints?