Default Folder X 5.1.9 reopens Finder windows, hides file extensions Posted 12/01/2017 at 17:10 UTC in Mac by firstname.lastname@example.org | Permalink | Tweet Denver-based St. Clair Software today releases Default Folder X 5.1.9, an update to their award-winning utility for Mac OS X. Default Folder X enhances the file dialogs in all Mac OS X applications. It provides fast navigation to your files, convenient previews, integrated Spotlight tagging, and more. Default Folder X's custom keyboard shortcuts put your favorite and recent folders at your fingertips. This release reopens Finder windows, hides file extensions and fixes several bugs.