I installed Mavericks a few days ago on my 13' late-2010 MBP and immediately hated it, so I erased my hard drive and restored from a backup I had. Unfortunately, that backup was Snow Leopard. I bought Mountain Lion from the Mac Store back in June and I went to re-download it, but it seems to have been replaced by Mavericks. Is there some way I could obtain a copy of Mountain Lion?