[samspenc]

Please don't wind down the project! I'm sure people are using it because they find it useful, and I think they would be disappointed if it stopped - I know I would if someone stopped working on an app I used heavily.

(1) I think its worth trying to sell the app - you did a good job, obviously it has a user base, and I think its fair you get paid for it and have someone continue to maintain it.

(2) If that's a hassle and you lose control of the project's trajectory - why not open-source? Your users would still use it, it would be free, and there might be some power user willing to take it on and improve the code base.

(3) As someone else mentioned in the comments below, maybe find a contractor to maintain it? This only makes sense if the cost of the contractor is less than what you're making off it, of course.