Hey CS! Thanks for the tutorials! I'm brand new to 3D modeling, Studio's my first try. I'm having some of the same issues. I got the free Michael Base model and some clothes to add on, as well as the free bundle pack. 

The problem I'm having is getting Studio to recognize them. I'm running in Mac OS-X so my interface may not be the same as your tutorial because of that. 

In my Content Tab, I don't have a Content folder and Studio folder. 

What I have is an Unassigned box, Animals, Motions/Poses, People, Scenes & Props, Tutorials, Utilties, and Vehicles. 

All of these have sub-folders, but only the subfolders in the Unassigned have any content in them. And that seems messed up to me, though I may just not understand what each is. 
Under Camera, I've got 3 pieces of the Stinger spaceship, under Figures I've got mulitple boxes but basically it's Aiko's clothes, Victoria's Casual Clothes, the Aiko3, my animals, Victoria4.2EZ, the V4 shorts and bra (separate folder), background scenery, V4Glamor hair, the Stinger spaceship, and the V4 Trainers.

The Michael and clothes that I got are nowhere to be found. 

Any advice?