Content Directory Question

When I right-click on a path in Content Directory Manager (DS Formats or Poser Formats), sometimes a 'Remove Base Directory' option is given, and sometimes a 'Remove Runtime Directory' is given.
What is the difference between the two- 'Remove Base Directory' and 'Remove Runtime Directory'?
Comments
'Remove Base Directory' applies to DAZ Studio formats, 'Remove Runtime Directory'' is for Poser formats.
Oh!
Yes, thanks! I was removing enough directory paths, that I should of noticed that. But I didn't.