when I was doing some animation, using expressions to change feature values. I generated a basic animation to test it. Not sure if I pressed anything but now, when I go to Menu>Tools Expressions are no longer available. I cant get the window to open so I can add or modify expression values. This is NX10, does anyone know what I might've done to disable the ability to get into the expressions window? CTRL-E does not work either its as if the feature of using expressions has completely been removed.