How to remove icon from launchpad that doesn't appear in applications folder?

I was careless and click on a download for flash player that I think was some kind of virus. It downloaded two things onto my computer, one was called "Mac Mechanic", and the other was "Booking.com". I think I managed to remove most of what it installed. I deleted "Mac Mechanic" from my applications folder and now it no longer appears in launchpad. "Booking.com", however, does not appear in my applications folder, but an icon for it still exists in launchpad. How can I remove this from launchpad? No option appears in launchpad to get rid of it. Is there something still downloaded on my computer that I have to remove. Any help would be much appreciated.