> about half a year since that popular Latacora post recommended it for transferring files, and said "Someone stick a Windows installer on a Go or Rust implementation of Magic Wormhole right away".

I read this and then went and ported wormhole to Go: https://github.com/psanford/wormhole-william. There's no Windows installer but it's pure Go so building on Windows or cross compiling for Windows is easy. Besides Windows I also want to support iOS and Android (I have a very rough working react native frontend right now).