That's pretty much why I never upgrade from 3 to 4. Now, it you can go from 3 or 4 -> 5 for $49.99.
It appears that you can upgrade from 3 or 4 to 5 Pro for $49.99. As far as I can tell, I don't need any of the Pro features. And that's the same price as buying the non-pro version outright. So not much of a deal.