Directory settings

This enables you to set the maximum number of directories you will have
internally buffered.

  Disable directory caching
    Directory caching is turned off.

  Re-read modified caches
    If the contents of a directory has changed since you last activated it,
    it will then re-read the directory.

  Enable MUFs Support
    Enables Multiuser filesystem support.  If disabled then Opus will not
    open the mufsxx.library. If enabled Opus will open it at start.

  Maximum Filename Length
    Allows you to set the maximum filename length that will be displayed in
    listers.  The default is 30, the maximum is 107.