HT4009: iTunes Store: About In-App PurchasesLearn about iTunes Store: About In-App Purchases
Currently Being ModeratedNov 5, 2012 3:51 PM (in response to burrell1126)
Have you tried to check the App Store to see if it shows a price or install button for InstaPad Pro? If it doesn't show the price, you can go ahead and download it.
Also, check your purchase history from iTunes.
If you still aren't able to download it and it doesn't show up in iTunes purchase history, try checking the InstaPad support site.