Additional purchases have an expiry date

I had purchased additional study guides. At a cost of $8 and $10 dollars. After several years, the app is notifying me that the purchased additions have expired and need to be purchased. Thought it was a glitch. Deleted the app... downloaded app. But additions are no longer available, only a purchased when I had already purchased them 3 years ago! Thats not cool.

The good The bad The ugly 2011 about Holy Bible King James + Audio, v7.2