The 2.8.5 minor Plugin update for Product Importer Deluxe skips the 2.8.4.x releases as Product Categories Importer has now been baked into Product Importer Deluxe making it a single unified Plugin. Woop!
For WP e-Commerce 3.8 users the Products and Product Categories menu items appear under Tools > Import, for WP e-Commerce 3.7 users everything is still under Store.
By bringing Product Categories Importer into Product Importer Deluxe users can now upload the Plugin ZIP with the WordPress Plugin Installer under Plugins > Install without throwing the “Could not find a valid header.” error. 🙂