URGENT: downloadable products creating wrong download links

Is there a way i can go back to old version of WC? My products have more than one downloadable file for each product and when you click download links from customer account it only downloads the first file in each product. Everything looks correct on the back end of orders and front end in account but download links don’t work correctly. I have disabled all other plugins and everything else seems to be working correctly but this is an urgent problem for me because customers do not have access to files they purchased. It has changed downloads for all previous and current purchases that have more then one downloadable file per product.