[Plugin: Page Lists Plus] Parent page still linkable

Hello
I installed the plugin because I have a parent page that I don’t want to be linkable:
early works
-traditional
-digital

I enabled the “link” check box in the settings and then went to edit the “early works” page and checked the box at the bottom of the page. But when I go to the page, it’s still linkable. The theme I’m using is a modified Pretty Spots 1.0.3 Here’s the link:
http://jeffmillies.com/wp

Any suggestions would be great, Thanks.
-jeff