default templates

Help!!  I'm trying to reset the path for document templates, I've reset the system option for File Locations, Document Templates to the path where the new templates are stored, but there's a setting for "Default Templates" as well, and all three types are "grayed out".  There's a button beside them with an ellipsis (...), but when I click on it, there's no "Browse" button to allow me to surf to the new location.  When I try to open a new part, the templates available are the old ones.  How do I change this file path???  Thanx.

SolidworksParts And Features