If I upgrade to a new version of Smaart, can I still use my old version?

Each version of Smaart operates independently of all other versions, so you can still access/install your old versions even after upgrading. The upgrade actually only refers to the pricing that you receive for the new version. You can even run multiple versions of Smaart on the same computer at the same time, as long as the drivers for your audio device support access from multiple programs simultaneously.