Adding a global Push-to-Talk with Wave Link 3.0

Does anyone know a way to implement a global PTT through Windows using the new Wave XLR MK2 and Wave Link 3.0?

I used to use a small program called micswitch which globally muted the default Mic-in when using Wave link 2.0, but this technique doesn't work anymore. It ignores the mute button in Windows Sounds. Any suggestions?