I once devoted 2 years of my life to developing a file manager called fman [1]. In total, it generated probably 35,000$ in profits, so my income from the project is somewhere around 10 $/h. As software developers, our opportunity costs are high. I use my file manager to this day and love it. But I regret spending so much time on it.
Congratulations on your launch. I wish you more success than I've had. Failing that, I wish you that you will see earlier than I did when it is time to move on.
I once recorded a video about my experiences developing a file manager [2]. Maybe you'll also find some interesting bits and pieces on fman's blog [3]. Incidentally, an article there is what sparked my current venture, which is much more profitable: consulting services around automatic updates.
If you'd like to have a chat, feel free to reach out. My contact info is on my website. :-)
Good luck!
[1]: https://fman.io