HD Decoders are not downgrade-able lower than the factory default version. All Video Management Systems should not have issues with newer Firmware. All their implemented functions should work.
*Firmware 9.10 must be installed prior to installation of this firmware 9.51.
Firmware download location: Download Store or on the product page > Downloads: VIDEOJET decoder 8000 page
This article provides you the way you can set the VIDEOJET decoder 8000/ 7000 (VJD-8000/ VJD-7513) to factory default.
Article requirements:
VIDEOJET decoder 8000/ 7000
Keyboard
monitor