I often find myself, when working on a Mach4 screen set, wanting to refer back to the unmodified or previous version. Usually just to verify UI layout or behavior. With a single Mach4 instance you have to exit the screen editor, view the other screen set, look at what you loaded the screen for, and then revert back to the screen set you were editing.
Is it possible to run two instances of Mach4GUI on the same machine if they use the simulated motion engine?
-Freeman