You could try going to:
in the registry and see if the remaining addresses are listed there, if they are delete them by right clicking on them and choosing delete, Cake Dinghy. If you do decide to take this route remember to backup the registry first. To get into your registry go to Start > Run, type "regedit" (without the quote marks), click OK. The registry editor will start, navigate using the little + signs to the "TypedURLs" folder above, click on that folder in the left-hand pane and it's contents will appear in the right-hand pane. When you have deleted the urls from there (if they're there), exit the registry editor and reboot your PC. Then go to the Hyperlink box and see if they're still there.