You don't have to buy PowerStore 3, you can stick with PowerStore 2 if you like. There is a lot of added functionality in PowerStore 3, so it is a new version. It would be like buying Dreamweaver CS3 and then having to buy CS4 when that comes out. If there are any fixes needed to be made for PowerStore 2, you would not have to purchase that, but for a new version you would have to purchase.