ChatPG finally woke up. Guess it was too early in BC...

To clear the contents of a mixer slot in Band-in-a-Box, you can follow these steps:

Open the Mixer window in Band-in-a-Box.
Locate the mixer slot that you want to clear.
Right-click on the mixer slot.
From the contextual menu, select "Clear Slot" or "Erase Slot" option.
The contents of the mixer slot will be cleared.


You have to select Track Actions > Erase Track.

BUT the first 7 tracks play by different rules (you cannot get them "empty")