Don’t know what to tell you as all I could find on the forum was this post: Aeros - Mute Immediately vs. Mute + Unmute
Aeros may be expecting that you’ve configured the settings.
If you have a MIDI controller, you can use that instead.
If not, reach out to Support, support@singularsound.com for help. Would be interested in hearing what they have to tell you so please circle back and let us know.