What kind of outcome do you want?

Most of the responses here concentrate on trying to get some kind of financial return for your work.

That's important, but for you it might not be the most important thing (you were giving it away and working on it in your spare time, right?)

Consider asking to make it your full time job, or something like that. You clearly know the field well, and you've managed to build community. Having the company resources behind you and the responsibility to run the project like you want might be an outcome that interests you.