Log Message:
Update to 1.69. Changes:

- End directory names with "/" instead of ":" (which never \ 
made sense).
- Added option to suppress sorting by extension.
- Changed display of sort by extension in several ways:
  Separator character now appears at the beginning of the extension.
  'dot files' (with a leading separator character) are now shown as
  having no extension.
  Extensions are now enclosed in parens instead of curly braces for
  better readability.