I am wondering if you have to have a tree on ancestry.com to use this effectively. I have had a subscription to ancestry.com for many years, and have been doing genealogical research for about 30 years, and have been thinking about putting my tree on ancestry.com, but have not yet done so. I downloaded this app, but the first thing it wanted was a tree. It seems like you can't actually get into ancestry.com and do searches unless you have a tree. Is this correct?