Hello, @codeWhisperer,
Kindly first contact your service provider to restore the backup on your site after that first try to update the theme and then update the theme required/recommended plugins, I hope you will never face any issue.
Update the theme and Core plugin Please read and follow the doc for better understanding: https://xstore.helpscoutdocs.com/article/63-theme-update
Regards 8Themes Team.
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