title: Upgrading iPhone App
body: <p>I currently have the first version (1.x.x) of my iPhone app on the App Store. I've updated it before, and it has never been a problem. However, I am about to update it to version 2, and because I re-wrote it from the ground up, I started it in a new Xcode project.</p>
  
  <p>Version 2 works great on my phone, but when I download version 1 from the App Store, and then install Version 2 on top of that, it crashes immediately on launch. I literally mean immediately, the phone never goes away from Springboard.</p>
  
  <p>I've done a little digging, and someone suggested trying it in the iPhone Simulator. It actually does work fine in the Simulator. I just want to be 100% sure that this won't be an issue for people upgrading.</p>
  
  <p>Has anyone had this problem before? And if so was it fine when you published it to the App Store?</p>
  
  <p>Thanks!</p>