Sorry, but can I do this in the WP Editor? I looked all through nextgen-gallery/nggallery.php within the plugin editor and could not find where to do play with the PicLens link. Also, lines of code are not numbered, where am I off here? Thanks!
In my case helped: manually in my plugins directory, ussualy \wp-content\plugins\nextgen-gallery\view\gallery.php edit line 32 in this file gallery.php for change in gallery(in post/page) or in file gallery-caption.php for change it in Caption description.