WooCommerce Product Add-Ons Not Showing on Front End when Imported

I am using WooCommerce Product AddOns. When I set up a new product and manually enter my addons, they show up on the front end just fine. When I use the import feature to copy over from already existing products, they do not show. One of the reasons given for this in the documentation is “not clicking the save button” but I do not see a save button anywhere in the addons window. I appreciate any advice on how to rectify this so I don’t have to manually enter all my addons. Thanks!