The new installer does add any such "Setup" entry in the start menu.
There is a "Settings" entry, however, which allows you to change controls using the original DOS menus.
Don't change too many controls, however, especially not the "turn right" and "turn left", or you'll be unable to navigate menus.
Remember to press U to toggle mouse view in game.
thanks for this, I was being dumb and overlooked the "launch settings" option in the directory, everything worked great from then on