- Launch program.
- Drag directory of MP3s into left pane.
- Cluster as usual
- Pick that cluster, and lookup or scan, doesn't matter, jut needs to end up in the right pane.
- If you now press the red REMOVE (X) Icon without selecting any file or grouping in the right pane (or inadvertently anywhere else in the left pane), the program will abruptly terminate.
So the remove button should probably be disabled until it's primed with a selected target to remove.