Trust me you do not want the new experience on the Fire Stick 4K Max. It basically forced itself on me the other day and it is god awful. When you try to go into the menus you get stuck in the menu and unable to exit back to the normal interface. I don’t have a fantastic setup I just have a relatively current receiver with 5.1 surround sound speakers and the standard pass through settings have always worked for me in the past. I tried to watch a movie I have watched a million times before and when the extremely slow interface finally allowed me to press play there was no audio. That is to say it still showed the audio track it just wouldn’t pass it over to the receiver for decoding. In the past you could just for it to transcode the file on the fly but this was a 4K file and the transcoding options caped out at 1080p which is ridiculous. Luckily I was able to uninstall and disable auto updates and get back to the previous version of the application. The new version is completely worthless and if I just never update the application again I guess that will be a solution until they try and force the issue.
I literally have no idea what I can do to make the New Experience work properly but given the three days of pain I endured I’m not in a hurry to ever update that app again.