There are news from Dev in Patreon site:
"I started porting the game to another game engine. I will not say what game engine it is yet.
Why am I doing this? I have been receiving complaints from players for a long time that the game engine of my development, to put it mildly, is not very good: it bugs, slows down, crashes with errors. However, everything works just fine for me. But not the point. This is the first reason.
The second reason is the ability to port the game on a new game engine to different platforms in one click. I.e. on platforms such as Windows, Linux, Android, iOS, and so on. And this is really cool, isn't it!"
He wrote other things too but, as a lot of people here were asking about a change of software.......now he's working on it.