Properties Explorer not working

Hi all,
It is my first time using Materials Studio 7.0 (previously used 6.0) and although my properties explorer is displayed in its normal spot in the bottom left corner, whenever I click on an atom, no information is displayed. The dropdown arrow for the "filter" tab is grey, which makes me think the Properties Explorer does not recognize that I am selecting one atom, although when I right click and select "Label" on that particular atom, the menu recognizes that it is, in fact, an atom, and everything seems normal. If anyone has experienced anything of this sort, please let me know. I am running out of troubleshooting ideas! Thanks.