Your second screenshot shows the wrong version installed.
Quoted from Announcements:
*PLEASE* if you find your copy of nUI is not working like it is supposed to, first make sure you have the right version installed. When you log in to WoW, nUI will print the welcome message. If that message does not say "nUI+ Development Version 5.02.06 is loaded" or "nUI+ Development Version 5.02.06 is loaded" then you DO NOT have the right version installed and that's the problem.
If you do not have that version of nUI installed, then you need to go to
http://www.wowinterface.com/downloads/cat137.html and download the current "nUI+ (Development)" version that is listed there. As of tonight, that is version 5.02.06
If you go to that link and you get a message that says you do not have permission to view that page, then you need to complete steps 1 through 5 in the instructions that were included in the original "Welcome to the nUI Newsletter" e-mail you received after you confirmed your subscription.
If you haven't yet subscribed to the
Free nUI Newsletter, then go to
http://www.nUIaddon.com/plus.html and submit your request to join the mailing list. After you complete the confirmation of your subscription, you will be e-mailed instructions on how to access the nUI+ download area here on WoWInterface.