I could not find the HMS... file in your message and it might not have been the correct one because it shows 550 in the name and mine is a 450. When I went to support there wasn't a See All Support option just a list of solutions. I did poke around and found another file; HMS-K450WWM-1006.0 and put it on a USB stick. Then I found that the port on the sound bar wasn't the common USB and it is a female port too. All in all I'm still not getting an auto on and off like I had forever.
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