I am a registered owner of an older version of SkySafariPro (version 1.8 when the publisher was Southern Stars). The registration number is -deleted- and the date of the application is Feb. 2013. I'd like to find out if there is an upgrade path available to me from this version to one of the modern versions. Somehow I was never aware or notified about changes in the publisher and versions of SkySafari over the past few years, although I am a registered user of the latest iOS app version. Thanks for any advice.
What are the upgrade paths available for owners of old versions of SkySafariPro?