Answer Explanation (SPOILER!!)
You are told that Nicky might have left something in her daternotes.com profile ( http://www.daternotes.com/profileMain.php?username=buckeye2099 ) that might give us a clue to Bourne's whereabouts, also that it might be coded under one of Bourne's previous aliases. You are then told to locate the photo and load into out Image Filter to see where specifically Boune is in Manhattan.
If you go to the photo gallery in Nicky's daternotes.com profile ( http://www.daternotes.com/photoAlbum.php?username=buckeye2099 ). You will see a photo with a handwritten message labeled John Michael Kane (1 of Bourne's previous aliases). Click on the photo, this will open the photo in a new browser. Then copy the URL (web address) for this picture ( http://www.daternotes.com/images/profile_photoAlbum/JOHN_MICHAEL_KANE.jpg ). Go back to your Agent Console and paste the URL in the Image Filter. Then use Filter C. This will then find the encrypted map with the arrow pointing to Madison Square Park.