How do I close Blackberry World on my Q10?

I have WhatsApp installed on my Q10 . It saying that I need to upgrade the version of WhatsApp but when I select the option to do so, it fails because "There was connection problem. Blackberry World must close." I go to the Blackberry World icon on my desktop, select it....and same response. I have tried to reload Blackberry World but it won't allow me. How do I get out of this loop?

If you can open BlackBerry world

Pull down from top
Settings
General
Refresh BlackBerry world

You should get a message BlackBerry will close

Hit refresh

Good luck hope this fixes your problem

Posted via CB10 Canadian Passport