I have just recently updated to Version 6.9.4 and have just discovered that when clicking the add to cart & see options button, it does not work. Can you please advise how to fix.
It sounds like you have added the ectcart.js line to header.php https://www.ecommercetemplates.com/support/topic.asp?TOPIC_ID=110209 - make sure that file is uploaded at yourstore.com/js/