So here's the deal. I went to play Minecraft. It says it cannot be opened, so I delete it and redownload it. Everything works fine. I play Minecraft. I get off Minecraft and play some Black Ops 2. Then for some odd reason Nuketown was deleted and I had to download it again.. So I tried to download Nuketown and it wouldn't download! So I went to delete Nuketown 2025, and downloaded it again and it worked. But when I tried to play Minecraft again it wouldn't work! It seems I have to pick between one or the other but I would like to play both. Please help.