I'd like to empty the Active Block list of hosts from this productivity software called SelfControl (anyone knows about it?) because some of these websites are duplicates. I've tried pressing Del key, right-clicking on the website entries, dragging them into the main window and then pressing the "Delete" button -- nothing works. Is there some work-around? Should I modify some configuration file with my sudo privileges? I downloded the application as a *.deb package from the official site. I'm including 2 screen-shots.