Quote - Yes, Discoseven is right. The pack use a installer to put all files in right place. The freebie you can put anywhere ( I usually put in a HDRI folder under Textures folder).

Hmmm...Normally I either double click or click and drag a texture / object / pose / light ect. icon into my scene to apply, but there aren't any icons, in the browser tab, to click on. Is there another method of applying HDRI?

(The folder has been added to my Carrara browser...but there aren't any icons in it.)