Could you please take a screenshot of the full DS screen (To see where content pane is gone), your Content Directory Manager pane and location of your library on your HD.

As far as the Content Library, did you minimise it or close it by accident? What happens when you go to the top menu and select Window/Panes (Tabs)/Content Library?

I don't really think reinstalling DS would help with the issue, you need to make sure that DS is directed within the CDM to the hard drive location that you would like to access content from.

The fact that other content is visible within DS shows that the program is functioning normally. If you cannot see additional content you will need to make sure the location is mapped within DS to give access to these files through the content library. Basically these files are not correctly installed for use with DS at this point, as DS has no idea where to find them. Daz Studio however appears to be functioning normally from what I can tell.

"Daz uses PostgresSQL" I believe this is mainly for Smart Content and shouldn't effect local libraries in the Content Library tab.