I've installed adguard for Mac and it used to work. In the last month I noticed the little adguard icon which appeared in the bottom right hand corner of web browsers has disappeared. I finally decided to check today, and it's not providing any functionality in any web browser. The icon doesn't appear, ads aren't blocked, the WOT functionality similarly isn't present. Can anyone suggest a way to fix this, as currently it's a resource hog which is functionally useless.