Download
The first build is not published yet.
Build it yourself in the meantime
git clone https://github.com/jn-aman/mjolnir
npm install
npm run release
The source is the whole app. There is no hidden half.
Windows
Not yet. Nothing in the app is tied to one operating system, so Windows is a build target rather than a rewrite, and it will come once the first paying customers are happy.