Subfolders of "docked" folders don't open in Finder any more - how to change back?

the subfolders of folders in dock (such subfolder of downloads folder, no matter if in fan or grid view) don't open in finder more. instead, boxer app launches.

think problem have installed "iunarchive" , accidentally associated fielders app. after unlinking in apps preferences normal folders in finder or desktop open finder. subfolder if document or downloads folder not work more. seems os x treats them differently , tries open them boxer app now.

how can change normal behavior , associate these "dock folders" finder again?

have tried log out , in , killed dock , relaunched finder, no success...

 

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