Click the "Marketplaces" icon and click "Marketplace downloads".

Click "Chat Overview Chat Overview Start with a dashboard of 6 reports that show the kind of requests your team receives over chat. Includes 6 default reports"

Chat Overview Chat Overview Start with a dashboard of 6 reports that show the kind of requests your team receives over chat. Includes 6 default reports

Locate the theme and hover over it and click "Actions"

If there are any pages built with the theme, to uninstall the theme you have to remove the pages where it has been used. In the case of an existing child theme, you would have to delete the child theme in the design manager, then proceed to uninstall the theme.

Uninstalling your theme