If you do not need the menus at the top of the screen, simply press the Tilde key ~ to open the Console (it should work now) and type "showlegacymenu" and hit Enter, (that command will show or hide the menu bar) then press the Tilde key again to close the Console.
To open the new style menu, press the Esc key or the Cancel button on the DX controller.
Enjoy the Simulator.