You can uninstall a Setapp app like any regular application. For example, you can drag it to Trash.
Or, you can uninstall this app right from the Setapp window:
- Open Setapp and go to the On This Mac tab.
- In the list of installed apps, find the app you'd like to remove and click it.
- Click the disclosure triangle of the Open button and choose Uninstall from the shortcut menu.