Help with Webroot Security Essentials?

-I have Webroot internet security essentials and have had it installed on my laptop for about 3 months now.

At the start it worked fine and when I searched for something on Google, a little 'safe site' icon would come up next to each search result if they were safe.

The safe site icon no longer shows up on search results but I have checked my settings and it is turned on.

What could be the problem and how could I get the icon back?

Bear in mind I do not know much about computers so please put tips for fixing it in simple terms :)