Unable to unpublish or remove an app

Hi, if have a problem removing an app. I played around, deployed an app to plasmic.run subdomain … i dint find a way to unpubish it. So i decided to delete the test project. But the subdomain still exists.
Thats no prob at all, cause no special data in there. But if it had been one of my apps, i really d like to be able to remove it.

Best Regards.