Using iControl Solo > Detailed Directions > Managing Device Groups > Removing Groups
 
Removing Groups
1. In iControl Solo, expand the group folder you wish to remove.
2. Remove all devices from the group folder by dragging them to another folder or to the root of the folder structure (only empty groups can be removed).
3. Right-click the empty group folder, and then click Remove group on the shortcut menu.
4. When prompted to confirm the removal, click Yes.
The group no longer appears in iControl Solo.