In modern versions of Internet Explorer, IE11/IE10/IE9, you get a useful New Tab page, which has tiles for frequently visited websites. By right clicking the tile or by pressing the little cross button (x) in the top right corner of each tile, you are able to remove that particular site from the list of thumbnails. But, for some reason, once you hide a specific website, there is no interface to restore it. What if you have deleted some site accidentally? Or maybe you removed it previously but prefer to have the site listed in the Frequent section again?