Material Dialog Box - Appearance Tab

Hello. I am trying to apply a material to a part, which seems to work, but when I try to select anything in the list on the right, nothing happens. In the attached image, for example, "polished pine 2d" is selected, but I can't select anything else in the list, or use the scroll bars to navigate in the list.

Is this normal? How can I select the other variations of Pine?

I'm using Solidworks Student 2014-2015 Version 22.2.0.0040 (11.9.0.0.87342.0) (4.1)

Thanks, Paul