A couple of suggestions for the interface (probably none of them new to you, but who knows...well, you do[smile]...but here goes...

Make branches of the logical tree in the refine area collapsible, and maybe even nameable, which would bring meaning to sections of the refine area, and would free up screen space and hide "assumed" parts of the logical tree.

Allow boolean arguments in the filtered area so that multiple exclusions could be executed. OR, make filtering part of the refine area.

Thanks for a great program! I used it multiple times a day every day. Maybe more than just about any other program on my Mac!
0 0