Vienna 3.4.2 - Can't change fonts

[fardelian]

Open Preferences (⌘,) go to Appearance and click one of the "Select..." buttons to change a font. Nothing happens. This is a problem for me because Lucida Grande doesn't render some characters in my native language.

Running Vienna Version 3.4.2 :7bc20f57: (6905) on macOS 10.13.6 (17G65).