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 X Pro theme by Themeco .
We could identify 10 plugins (there might be more) - Accordion , bsk-pdf-manager-pro , Contact Form 7 , convertplug , Document Gallery , essential-grid , Private Content , tablepress-datatables-buttons , tablepress-datatables-row-details and ubermenu
Make all of your modifications to X Pro in this child theme.