Alright…feeling really dumb here folks.
I have gone onto Fab and “added to Library” the free “Cesium” plugin…how on earth do I get the plugin actually downloaded into Unreal? When I go to my library, its there, but nothing says (that I can see - hence feeling a wee dumb now) download or add to unreal…I just click on it and it brings me right back to its main page where I originally added it to my library…heeeelp for the newb pleeeaasssee