title: Daily new users count contains updating users, how to prevent this?
body: <p>I use Fabric Answers to measure the behaviour of the users of my iOS app. The thing is, I have been using Fabric for the last half year, but my app already existed for 5 years before that.</p>
  
  <p>Now, each user that updates to the latest version that came from a version without Fabric in it, is counted as a new daily user.</p>
  
  <p>In my app, I do have a method to determine whether a user is updating from an older version (through the existence of certain NSUserDefaults settings). Is there a way to tell the Fabric SDK that the current user is not new?</p>