Okay so i bought this game bundle from: http://www.humblebundle.com/    and it came with a gift code to minecraft for a 14 free thing but i want to buy the game i made a few worlds that i want to keep but it i was worried that if i buy the game i have to reinstall the app and that would get rid of my worlds and stuff im confused do i buy the game or do i buy the gift code ?? please help i have a free trial for 14 days basscaly and i have a few worlds i want to keep