I have changed theme settings (Typography options, Breadcrumbs options, Header options, Menu options) and added some custom styles to child theme to get back some old styles that I could. Check the site now, please, and let me know your thoughts.
I did not face any blank page during my work on your site, so check the server error logs to find out what problems caused the white screen. Also, describe in more details other WoCommerce bugs that you have, we’ll check if they are related to our theme.
Yes, sure. After plugins and theme update on the live site move the child theme style.css from the staging to live site. Then go to staging site > Theme Options > Import/Export > copy options export code http://prntscr.com/m7fwna then go to production site > Import/Export > press import from file and paste the code http://prntscr.com/m7fx3r + press Import button. That’s all.