Where is my Object & Texture catalog?

The objects and textures catalog is located in the 3D design mode, to enter this press hotkey F12.
Notice on the top right hand corner a icon that looks like an open book.
Click on this a menu will appear on the right hand of your screen.

This is your Textures/Objects Catelog.
If you see only File System and Drives you will need to drag the right hand side border of the catalog so you can view the object files/texture files.

From these files you can simply Drag and drop your objects/texture into your projects.