I'm sorry to hear that - I've been there, as they say. An update is done and then you lose a function, or it goes awry. I understand that is not good.
Now, with this Denon, I am wondering whether (given that sometimes, with a firmware update, the settings are reset to defaults) you simply lost a setting value, rather than a function altogether.
It is possible that the function is gone... but there's always the chance that if you complain to the maker of the TV (-or was it the Denon that was updated? if so, then complain to Denon instead! to whoever foisted this update on you, in short...), and that others mention it to them also, that the next update will restore that function - if it is indeed a missing function.
Does this seem right to you? I don't know your TV's maker name, so I have to pause my answer here to ask you that much, I think, please. Thank you.