[Plugin: NextGEN Gallery] Click to enlarge / Slideshow not working

Just updated my WordPress.

Plugin works fine, but when I click on a photo, it open up large in a new page and not the slideshow pop-up it used to.

I did not create this site, I just manage it. See here:

http://sterlingexteriors.com/exterior-renovation-gallery

Anybody know what I am supposed to do to turn this feature back on?

Thanks so much!!

http://wordpress.org/extend/plugins/nextgen-gallery/