You are right, sometimes Carrara simply dont add the content to the Browser...

GiDome 1 have two folder that need to be added to the MISC tab:

C:Program FilesDAZCarrara6ProPresetsBackgroundsGIDome1     and

C:Program FilesDAZCarrara6ProPresetsBackdropsGIDome1

The first one are the HDRI like images, and the other are some background colors only.

The better Idea is to add the whole Background and Backdrop folders to the Browser, so everytime something is added it will be showed there.

Follow me at euQfiz Digital