Hello,
This theme version is so out to date. Basing on my previous experience with the theme version older 4.5, in most cases, it is very difficult to update the theme and you may have to re re-create the theme configuration from scratch. All the content would remain safe, however, the header, footer, all the widgets may require configuration.
In any case, make the full backup of your site and try to update following all these instructions: https://xtemos.com/docs/woodmart/update-theme-2/
Before updating deactivate CMB2 and Redux, delete these plugins. https://xtemos.com/docs/woodmart/faq-guides/3-x-4-0-migration-guide/
https://xtemos.com/docs/woodmart/faq-guides/4-x-5-0-elementor-migration-guide/
Pleasde do not install Elementor.
Best Regards