Does not work with HDMI

I have BenQ projector with Internal Speakers and I was having dificult time to control my MacBook audio. I was hoping this app will make the bagic based on several web articles that I found. Unfortunately it does not work. I was able to find my HDMI speaker interface but trying to adjust audio slider for output gives me error.

Thansk Apple for not providing an option to request refund.

jazzybeat about AudioSwitcher