When I received a notice from Firefox that I should refresh/reset the browser because it was running slowly, I did so, knowing that my add-ons would be disabled. However, I can't find a way to re-install the McAfee SiteAdvisor extension. It was added to all of my browsers when I installed McAfee on my computer. Do I have to re-install McAfee in order to get it back? I tried downloading the free version of SiteAdvisor, but I got a message that I already have a newer version installed, so it wouldn't download.