Minor issue, but overall greatness – Delight Games Premium Library Review

I previously purchased the entire series Wizard's choice, separately from this full library. Yet, now, I cannot play it on this library. Could a "restore purchases" option be added, for those who purchased the books separately? Otherwise, this is legit one of the best apps I've come across. No joke, this was a wonderful idea. Thank you.
Review by Shadowed s Light on Delight Games Premium Library.