You're missing the point. - If it's your application and you originally released it under the GPL, you are of course free to change its licensing at any time. But from the information we have, it's not his application alone. There were others who contributed to this open source project. You cannot accept free (as in beer and in freedom) code from co-developers, then re-license and sell it your your own benefit. Had I ever contributed to the application, I'd strongly oppose such a suggestion. Which makes me wonder: If it's true that it's GPLed free software and if it's true that others contributed - why don't they have the sources and release the application to extras-devel? That's the whole point of free software, isn't it? Nobody can prevent you from sharing it.