I have written an alternative MasterServer in NodeJS with a working UnregisterHost function 
I’d appreciate feedback and recommendations.
Please be aware that this project is still in development! Take notice of the ToDos!
https://github.com/DonUrks/unitymasterserver
Thanks!
This software is now ready to us. I have added a little read me text and cleanded up the code.
Have fun!
Hello, I’ve been looking at your project.
And I’ve some questions maybe you can answer.
I’ve seen the MasterServer.cs file uses Net socket, it means only Unity Pro can use them.
The server.js script can be run on the Google Apps server? If so, maybe you could post a tutorial about how to do it.
Thank you! 