This kind of defies the whole idea with Word Trees:

The box forces me to choose between 'Praise' and 'praise', and there's no option to not match case, so I essentially can't use the Word Tree to get an outline of this Psalm. And I have a hard time imagining a Bible text more suitable for a Word Tree...
I suspect this may be a regression, a long time ago (the screenshot is from September; I just haven't had time to report it). I believe I remember doing similar Word Trees earlier than that, and not having this problem.
(I tried to save you some trouble by adding a direct Logos link, but it only seemed to open Passage Analysis to the last settings, not to the exact ones above, so I removed it again. Is that a bug or design?)