Product Add-Ons for WooCommerce

Product add on extension is lacking multiple file upload which is really frustrating. Yes, this is really required. Why would a premium plugin like this have such a restriction? How much more money do these woocommerce guys want? I already bought this add-on and figure out that the file upload does not allow multiple selections of files to upload. What a stressful situation is this? How on earth did they miss such a feature on a premium plugin? This is so annoying. I want to ask for full refund. I would rather use other plugins which allows this with a price that is worth of value. Please you need to do this asap. Kind regards!