Hi!
Open the program folder where PMUNIMIX pgm is.
Drag and drop the pgm icon on the bar like following picture (on the left or on the right side)
See, a light grey vertical pixel bar appears when the drop is allowed and where it can be done. I took pictures with the visible small light grey bar at drop location.
As you can see on my bar, I added a folder using sound icon. I placed this folder on my bar and into this folder, I've put all sound control programs.
Regards