Our detectives are back with the following intel on this WordPress site
The site is using two themes, one child and one parent. The child theme is based on the parent and often custom to the site. The parent theme is Eventica WP theme by TokoPress .
We could identify 3 plugins (there might be more) - js_composer , MailChimp for WordPress and WooCommerce
Child Theme Sample for Eventica WP Theme.