You can disconnect the device by reseting the screen in the editor interface, or completely remove the application from the device.
Simply just right click on the screen that you want to remove and select the Remove screen function under the Manage screen submenu.
Remove screen will completely remove the Wallboard application from the device and from the server.
You can also reset or remove Android applications manually.
To Remove the application manually go to android settings on your device, select apps, select the MSD Wallboard application and select Uninstall.
You can remove Windows application from the device manually too.