Toggling the Power button off once puts the TD1012 display to sleep. It doesn't power off the TD1012.
To power off the unit, you need to toggle the Power button on and off four times.
If you simply need to restart the TD1012, you can press the RESET button using a pen or paper clip. The recessed RESET button is next to the GPIO12 button on the side of the TD1012.
Note: If you set up the TD1012 for Local File Networking, you can push updated projects directly to the TD1012 from BrightAuthor.