Is it just me or does 0.9.9.16 have this feature too.
btw, if it still behaves the same, the config file cane be edited directly the achieve the same function (but perhaps not quite as elegantly).
Open "pvdconf" file in text editor
Find section folders parameters (with "[Folders]" as heading).
Change values of "FindFolders=" and "RepFolders=" to desired values
Note values appear to be a text field without quotes. Not sure what the field delimiter as I need only one find / replace.