Desktop audio not unmuted after streaming stopped

[davidakachaos]

So I tried this app out, it works fine. I had enabled the option to mute the desktop audio when streaming. This worked too; it muted the desktop audio. But when I stopped streaming, the desktop audio remains muted. I can see the volume meter in the mixer reacting as if the audio is being played (this was also the case when streaming the audio) and Windows 10 also seems to think nothing it muted.
Still, after using this app, the desktop audio remains muted.