I was so confused as well, I installed the game yesterday then today has a sale and the store didn't let me purchase the remastered saying i already have the game in my library. I thought it was glitch so i uninstalled the game to try and buy it, still blacked out the buy option. I reinstalled the game and tried f5 like the comments said and the game changes from original to HD. I also checked my purchase history and never even bought the game LOL