Any X-plane fans here? I was browsing the app store and noticed that the new version of this sim has two new planes and a couple of other improvements. However, iTunes never notified me of this update, like they usually do for all of my apps. Is this not a free update for people who have already purchased X-Plane? Do I have to spend another ten bucks to get two new planes? The same company has two new related apps: a jetliner sim and a helicopter sim. If I buy these, do they merge with my existing X-planes so I can use planes from one sim with the scenery of the other(s)?