DEVONThink Pro stores its files inside a folder named "Files.noindex", which is inside the dtBase2 package (which in turn is in {home}/Library/Application Support/DEVONThink Pro 2).
The .noindex extension is to prevent Spotlight to index the contents of this folder, and FoxTrot honors this as well. To force indexing the contents of this folder, you need to add this folder directly (instead or in addition to a parent folder) to the indexed locations.
Navigating to this folder in the standard file select dialog (when clicking the "+" button) is not easy as it is hidden; You can open it in the Finder by pressing the shift key in the "Go" menu to menu to go to the {home}/Library folder, then right-click the .dtBase2 file and choose "Show package contents". Then drag and drop the Files.noindex folder to the list of locations, in FoxTrot Pro's Manage Indices window.
For DEVONThink (non-PRO), the Files.noindex folder is directly in the folder "{home}/Library/Application Support/DEVONThink 2"
Jérôme - CTM Engineering
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