Not working after update

I’m not seeing the plugin on that site, have you disabled it? It’s difficult to debug any potential errors without more information.

Also, can you confirm you had at least one Post Type or Taxonomy enabled in the results? By default none are selected and you would get no results.

It looks like something in the theme is messing with the default ‘the_title’ filter. You can see the specific error if you bring up a direct link to the AJAX response:

http://wallpaperevo.com/wp-admin/admin-ajax.php?action=autocompleteCallback&term=lam