croc shouldn't be used if you want security:

[1] https://news.ycombinator.com/item?id=27054885

[2] https://twitter.com/Sc00bzT/status/1396199915638992896

Magic Wormhole has a good implementation in Go, which is compatible with the original Python implementation (croc is not compatible with magic wormhole). It has windows binary and binaries for most of the popular OS.

https://github.com/psanford/wormhole-william

Binaries: https://github.com/psanford/wormhole-william/releases

There's GUI: https://github.com/Jacalz/wormhole-gui

Android app too: https://github.com/psanford/wormhole-william-mobile

Support for resuming transfers is planned I think.