It seems the library browser doesnt see my libraries

Hi! I am a brand new LibreCAD fan.  I use Debian testing (bookworm), where the currently available LibreCAD is 2.1.3  I am quite curious about libraries of architectural objects (furniture, fittings) and I have unziped "Architect3_LCAD" This results in a number of files such as:
~/CAD/LibreCAD/Library/Architect8-LCAD/Furniture8/Complete8
If I run librecad from within this directory and click on Library Browser, I only get other directories ("algorithm', 'block', etc...) but no furniture.  Clearly I am misunderstanding the procedure.  Can anyone help?

The starting location has no effect to libraries.

Instead you should add the path, where your libraries are, to Application Preferences -> Paths setting.
Presumably you have to restart LibreCAD to apply this setting, but then all sub folders, containing DXF files, should be listed in the Library Browser.

see also https://forum.librecad.org/Blocks-External-Library-tp5716343p5716346.html