Have you downloaded the clipart ? It doesn't install with the main program, all the different category folders will be in your portal the same as the main program.
As Randall has said once you have downloaded it you need to install it same way you would install any other software. Once installed you should be able to view it in the main program & use it. The Design & make folder will be empty until you either buy some models from them of download some of the free projects they supply. You should be able to see the free projects you can download if you log in to your portal account