My iPod Touch has been failing to sync/back up recently, and I approved the new OS update on reflex. Now a third of my apps are gone! I have been able to reinstall the ones I have purchased without having to pay again, but here lies the problem. There are several apps I purchased for free on sale, but now they are paid apps (and expensive ones at that!). Do I have to purchase these apps in their full amount after already downloading them (albeit for free?)