Our initial purchase was made while v2 was in beta and with a promise of a free upgrade to the final v2, which was expected soon. Except it was never released, until now.
I am not claiming you ripped us off or that your product is no good. Pretty sure we eventually purchased 4 licenses, because it is a good product. But better communication, taking the whole thing a bit more seriously, would go a long way. You knew what day the betas were expiring, instead of leaving all the customers hanging, you could have proactively sent everyone license keys or a longer-expiring version. You could have posted a quick status update on your web site. As I mentioned in another comment, I vouched for you internally and when asked about it months later (budget reviews, etc) with still just a beta version, I didn't have any answers.