IC Pro fail after upgrade of app

Hi,
I’m the one who started this post…
My first attempt to solve this issue was trying to get the older version back from iTunes. My back-up was corrupted so I asked Apple for help. Here’s a quote:
1.Open the App Store or Mac App Store.
2.Go to the Purchased screen on your iOS device or the Purchases tab on your Mac.
3.Find the app and choose Download. You’ll see a message telling you if a compatible version is available. Tap Confirm to install this version.

If a compatible version isn’t available, you can try contacting the app developer. Look for contact information on the app’s product page in the App Store or Mac App Store.

So I did…

Q:Why is version 1.2 offered on an iPad running a non compliant OS?