Not Working or doing something wrong

Hi we have installed the plugin on this site https://www.tiendasmvd.com/ and we would like the catalog / product page not to reload when we want to see another catalog option. We install it and checked the classes (which seems to be the same as in the default instalation) but It don′t seems to work.
Can you check this please? Thanks

The page I need help with: [log in to see the link]