Currently (384.12) it behaves as described here: https://www.snbforums.com/threads/384-9_alpha-builds-testing-all-variants.54050/page-7#post-457622
On the AiCloud page, there is an uninstall button, but it doesn't seem to work. After clicking it the "USB Application" page shows "Uninstalling" instead of the app list, but it doesn't finish. restarting the router brings it back.