I have this plugin: https://booster.io and it seems that the redux plugin that goes with Store is preventing it from working properly. It works w/ storefront theme. If I switch back to xstore theme and deactivate redux framework plugin then the booster plugin works. The problem I am having specifically is that my product add ons are not updating in the cart. they update on the product page, but then do not show in the cart.
Plugins like that do not work with Ajax add to cart (Theme Options > E-Commerce > Single product > Ajax Add to cart > Off) and this option should be disabled. I have checked your site and see that you have already sorted out. Do you still need any help from our side?