alweiss:
Then I want to go back and either change it or add another link.
Easy but not user friendly: Just make sure that the pushpin information is displayed (click the pushpin, press F8 key), then click in the pushpin title field (at the top of the pushpin in gray color), then just press the TAB key and this is it. It will select the balloon data information without opening the browser if it is an url. Then you can just edit the information (or add another url if you like).