Hello, a few days ago my Q800C soundbar has auto-updated to the latest firmware "1003.6".

This has introduced a bug where "DTS HD MA" audio codec can no longer be played. The soundbar displays "Stereo PCM" even though the content has "DTS HD MA 7.1".

This used to work on previous firmware "1002.0". No other changes to physical connections, nor software was made.

Is there any way to manually downgrade firmware?