That was an internet browser window, showing the Kodi remote in DroidBOXCloud
For any future browsers of this thread and seeing similar problem, you need the Windows Explorer program/My Computer/Window (hold down the Windows flag on your keyboard, tap E, release both) that shows all your drives/USB sticks etc, then to enter \\ and OPENELEC , LIBREELEC or the IP address ).
This is Chris by the way, SilentlyScreaming renamed.