Studio Drums IAP won't install
Hi, I bought the new Studio Drums IAP a couple of days ago but try as I might I cannot get it to install. Bought 6th Aug (I have the Apple receipt email). When I try to install it fails with message like "Studio Drums: PURCHASE FAILED mzafbenc.[long number] couldn't be m...cause an item with the same name already exists." Any thoughts how to fix this?