Yes, it is true, we do charge to upgrade to the next full versions of our products. We do offer a free upgrade for anyone who has purchased within the past 30 days and automatically upload the software to your download center if it applies to you. In your case, you purchased (for 50% off) PowerStore 2 back in October.
We do offer great upgrade pricing ($89.99) via your upgrade center if you are interested in things like a couponing and discounting system, integrated content management, admin dashboards, enhanced product options and the ability to work with your PowerStore 2 database.
I'm sorry if you feel like we are not being fair as it is not our intention. We worked hard to offer a great solution at a very aggressive price.