How to access LumenRT materials / components IN Sketchup

Does anyone know how to add/see the LumenRT Immersive Content (i.e. materials, components) in SketchupPro or Make? I have both SketchupPro 2017 installed, and LumenRT. Per page 85 of the LumenRT user manual, I browsed all the files under: C:\Program Files\Bentley\Bentley LumenRT CONNECT Edition - Update 1\ I am not seeing a folder with files that can be read by sketchup.

It appears that for materials or components I should Open or create a collection and browse to a folder, but not sure where the content would be.

Thank you!