Go to the Confluence Administration > Manage apps.
Install version 7.4.
Make sure Refined is compatible with your Confluence instance.
Make sure that your Confluence instance is fully backed up.
Navigate Go to the Refined Administrator section by pressing Configure or by navigating to Confluence Admin Confluence Administration > Refined > Configuration.
Press Click the Upgrade the theme data to Refined 7.1.x data button.
When you have upgraded Refined for Confluence, advise your users to refresh their browser. Stylesheets and scripts have changed in new versions and need to be reloaded.