I bought Beatmaker version 1.3 a few months back. I want to download it, but the current version is 1.3.3 and iTunes wants to charge me $19.99 to download it again. Is this right? I thought I could download it again for free When am I allowed to download a previously purchased app for free, and when do I need to pay again? Should I just buy it, then click on the "report a problem" link to get my money back?