You’re right that it’s technically easy to port the application; in fact, we routinely run Noteflight “in the shop” as an Adobe AIR application for testing purposes. But… there remain many tricky questions surrounding exactly how Noteflight would function as a desktop application, how it would be packaged, how it would be maintained and upgraded, what its file format would be, and on how it would relate to our online environment. So we’re continuing to ponder for now (and we’re not ignoring the idea)!