The only category.php file I have is in /wp-includes/category.php. My base theme (Genesis Framework), my child theme, and WooCommerce don’t have category.php.
I looked into replacing the default loop for the Genesis Framework and WooCommerce, but the codes in those files aren’t like the one in the demonstration video.
I was able to use the shortcode using Genesis Simple Hooks plugin but now I have duplicate content.
See Screenshot: http://couponingincanada.ca/wp-content/uploads/2015/09/screencapture-couponingincanada-ca-product-category-pets-1442256498599.png
Also, the homepage (Shop Loop with all products & categories) doesn’t display the Masonry plugin.