Just save a link to any one of the Cobra Manufacturer Groups, for example:
Club Cobra - Superformance Owners Group
Enter the Club Cobra website using that link, then go to the top left hand corner of the page and click on "Club Cobra". That will take you to the main page. Works every time.
Yes, it's a bit of a PIA, but it just takes one extra click of the mouse and you're in.