Version 2 added two of my biggest feature requests - custom keyboard shortcuts, and the ability to preview entire documents before exporting. Makes me super happy!
The product is interesting but pricing policy is not transparent. I use several writing apps with lifetime licenses, "Write!" for example, and they follow their promises. I don't see reasonable changes between Writemapper versions 2 and 3. I don't feed that I really by new product. So I am gonna use this app for some time, but most likely I will be looking for alternatives and to developers of other writing apps to implement similar mind-mapping interfaces.