This should work
defaults write com.devon-technologies.think3 ShowAdditionalInfoInPathBar -string yes
You can find all hidden preferences in DEVONthink’s help:
- Menu
Help > DEVONthink 3 Help - Go to
Documentation > Appendix > Hidden preferences
Unfortunately clicking the provided links has no effect, you have to
- copy the link via the contextual menu
- open it in a browser, e.g. Safari
- open a new DEVONthink window to see the additional info in the path bar