Pin it button not working on some woocommerce pages

Hi! So far the plugin works great! I am just having minor issues with my woocommerce product single pages. It seams to only show up on the related product thumbnails but not on the main images.

Example: https://pumpsandpouts.com/shop/the-pp-shoppe/womens-racerback-tank/

any way to add to specific images? I was trying to figure out how to use the class option, but not sure if I’m using the correct CSS class or where to insert it. I couldn’t find the advanced image options when I went in to edit the image like you have in the documentation.

Thank you,