Racket 7.5 scripts library raises Internal Error on OS/X 10.13.6

After a fresh install of 7.5 on OS/X High Sierra, in DrRacket, selecting Scripts > Manage Scripts > Library raises the following error:

directory-list: could not open directory
  path: /Users/jhemann/Library/Preferences/quickscript/user-scripts
  system error: No such file or directory; errno=2
  context...:
   /Applications/Racket v7.5/collects/racket/private/kw-file.rkt:137:4
   /Applications/Racket v7.5/share/pkgs/quickscript/library-gui.rkt:44:4: set-files-lb
   /Applications/Racket v7.5/share/pkgs/quickscript/library-gui.rkt:156:4: dir-lb-select16
   /Applications/Racket v7.5/share/pkgs/quickscript/library-gui.rkt:27:0: make-library-gui6
   /Applications/Racket v7.5/share/pkgs/gui-lib/mred/private/mrmenu.rkt:250:14: command method in basic-selectable-menu-item%
   /Applications/Racket v7.5/collects/racket/private/more-scheme.rkt:148:2: call-with-break-parameterization
   /Applications/Racket v7.5/collects/racket/private/more-scheme.rkt:265:2: call-with-exception-handler
   /Applications/Racket v7.5/share/pkgs/gui-lib/mred/private/wx/common/queue.rkt:435:6
   /Applications/Racket v7.5/share/pkgs/gui-lib/mred/private/wx/common/queue.rkt:486:32
   /Applications/Racket v7.5/share/pkgs/gui-lib/mred/private/wx/common/queue.rkt:634:3

Reproduce the failure in DrRacket 7.5 on OS/X 10.13.6 by selecting Scripts > Manage Scripts > Library. Inspect share/pkgs/quickscript/library-gui.rkt around set-files-lb and the missing user-scripts path; done means the Library opens without an Internal Error after a fresh install.