How to turn off your Matrix Media Centre Properly ...
In the Matrix media center go to the tab next to the star on the bottom left corner of your TV screen and press ok on remote , a window will popup on your screen with a option to exit, press ok .
Pressing the RED BUTTON on remote right below the power button will exit you out of the media center and back to the home page . Once your in the android homepage simply power off by pressing the power button on remote.
This method should always be done to ensure that your MyMatrix Media Center Kodi layout is not deleted.