Hello,
Thank you very much for choosing our theme and for contacting us.
We would recommend doing the following:
1. Recreate your live site from the backup as it was when it worked.
2. Create a staging platform and install and activate the legally purchased theme.
3. Export/import the Theme Settings from the live site to the staging site, if there are any problems, you will have to recreate the settings: https://xtemos.com/docs/woodmart/theme-settings-panel/#Import_Export
4. Then import the header: https://xtemos.com/docs/woodmart/header-builder/how-to-exportimport-headers/
5. Finally import-export the content via Toos > Export/Import and then move your ready staging site to live domain.
If you need any help or have difficulties let us know we will guide you.
Best Regards