How to search for dupes in inner vs outer file pool?

[pstein]

Assume I have a directory (tree) starting with top folder

D:\tools\projects\myproject123\logfiles\

Lets call it "criticalfolder"

Now I want to find out if the files in the criticialfolder sub tree exist anywhere else on partition D:\

I don't want to move the criticialfolder outside to another partition.

Instead the search should be done between the 2 file pools:

1.) The "inner" criticalfolder
and
2.) The "outer" folder D:\ EXCEPT the inner criticalfolder

Duplicate files INSIDE each file pool should be ignored.

How can I achieve this with dupeGuru?

If I drag D:\ to dupeGuru,
Then exclude subdirectory D:\tools\projects\myproject123\logfiles
and finally drag D:\tools\projects\myproject123\logfiles
then dupeGuru tells me:
"D:\tools\projects\myproject123\logfiles" already is in the list"

I guess this is a bug in dupeGuru

Thank you