Good day.

After the recent upgrade of my NP2900/12 player to VB16.22S firmware I can't play mp3 anymore over my FreeBox DLNA server anymore.
The player can play radio stations, shows mp3 files list split by genre etc., but when I select particular mp3 file, it does nothing, no matter how many times I press OK button.
How can I downgrade to the older firmware, please ? new one renders my device completely useless.