Every time I open the find dialog, the "Search In: folders" item is blank so it finds nothing (because although I select criteria e.g. filename, I forget to select something in the folders section).
It would be good if this setting defaulted to the current folder in the active pane or the previous folder used, or if there were a setting to allow you to choose.
It could just be coincidence but I've just upgraded from 613 to 615, and this now appears to be fixed - the current folder in the active pane now appears in the folder field by default.
Glad that it's working for you now. This has always worked correctly for me by default (Folder field prefilled with the current path), no changes to settings required.