>>>how do I turn off the menu bar and get the side bar back?
>>
>>The old setup is not supported.
>
>I do not care for this new setup. If it matters for some kind of consensus, I would really prefer an option to have it back the way it was. A little icon with a picture of a paper with a number four on it does not jump out to me and say "Get all messages since last month" I realize I am but a speck on the windshield of the future.

You may disable that icon if you don't need it.

The overhead to support the old interface is too big.