We wouldn’t be following our own advice without having a clean uninstall option. 😉
Perform a Clean Uninstall of Perfmatters
When enabled, this will cause all Perfmatters options data to be removed from your database when the plugin is uninstalled. Follow the steps below.
Click into “Settings → Perfmatters.” Then click on the “Extras” tab. Enable the “Clean Uninstall” option and click “Save Changes.”
Click into “Plugins → Installed Plugins.” Deactivate the Perfmatters plugin and then click “Delete.” All the database options, settings, etc. will then be removed.