Hi Tommy
Head over to Plugins, search for and install a plugin called Code Snippets. Go to Snippets > Add New, name the snippet as you’d like and insert into the snippet body:
function ultra_child_woocommerce_setup() {
remove_action( 'ultra_woocommerce_breadcrumb', 'woocommerce_breadcrumb' );
add_action( 'ultra_woocommerce_breadcrumb', 'ultra_breadcrumb' );
}
add_action( 'init', 'ultra_child_woocommerce_setup' );
(Copy this function from the forum, not from an email.)
Select the option to run this snippet on the site front-end, save and activate.