I hope my previous comment didn't sound angry or disappointed. I'm doing this kind of small programming projects all the time during my vacations, mostly as exercise. When the vacation is over, I release it as open source. Maybe someone else is interested and can make use of it.
But I don't have the time to create a fully fleshed out product with documentation and all just for a lark. That's a lot of work and commitment. And writing documentation isn't exactly fun. Since I'm doing this for free, the only currency I get for working on a project is recognition. The more recognition, the more fun I have. And if there's no recognition, then I'll start something new. That's how open source works, I guess.
I have noticed in the past, that game developers do not seem to trust open source projects. And I can understand that. The quality of open source projects can be very uneven and documentation non-existent. But open source is all I have to offer, warts and all. For complicated reasons I'm not interested in monetizing my hobby. I have a decently paid job, that leaves me little time outside of vacations. So there's little incentive for me to continue working on UE4Spriter.
But I'm open to suggestions. If you have any ideas, that could hold my interest, you know where to reach me :).