> Sadly cross platform supports only came with version 3 and that means saying goodbye to the small Windows native downloads, but it's not an Electron monstrosity.

Yes, it's NW.js instead of Electron, but that's still an almost 100MB framework (and the >50MB sounds directory doesn't help much either). It's also closed source, though the documentation is hosted at GitHub: https://github.com/writemonkey/wm3/wiki/Documentation .