Is there any chance that you are considering adding a "pay as you go" system, or "rental" for any of your Limited products? For example, if a Student using the Student edition of Capture Argo needs to print a plot so as to be able to hand it in or hang a plot, one could pay x amount of money to be able to do this once or twice. Same idea for solo editions- if one needs a 2nd Universe for a show, one could rent an "extension" for a week and be able to do a design, then go back to single universe.
Just a thought.