I have Clothing coming up under Figures so when I try to add it, the figure goes away and is replaced by the clothing. Most clothing items are figures, although there are exceptions (simple clothing props, dynamic clothes, etc.). The new stuff in your Pose folders are probably MAT files to apply textures to the clothing items. When loading clothing from the Library, don't double-click the thumbnail image. That replaces an existing figure with the new selection. Instead, use the double-checkmark button at the bottom of the Library panel; that will load a new figure into the scene, rather than replacing one.