Problem

I love the app and bought the full version. I am a teacher and it works great for my 3rd graders so I dont have dice flying around the room. However, even though I bought the full version it wont load the full version on my other iPads. Normally when you buy an app you can use it on up to 10 devices. Is there something Im missing ? How do I get the full version I paid for on all of my devices? If I can get this straightened out I would be happy to give the app more stars.

Ladedadwdadeda about Nice Dice - 3D dice roller