Outlook 2013, Adressing Window will not OK

I'm using Outlook 2013 on Windows 7 Professional

When trying to set the default address list I am unable to select okay.

Outlook 2013 ==> Address Book ==> Tools ==> Options ... ==> When opening... changed to my iCloud or personal mailbox ==> OK does not respond, but is not greyed out.

So far I've tried:

Rebooting

Disabling All Add-Ins

Formatting and reinstalling windows and office

My principle account is just a POP3, but I have my contact through iCloud

Thanks for reading!