Kids got me playing minecraft with them again. I wont lie that I am a graphics snob to first thing to do is mod the game. For minecraft this includes installing Optifine which downloads as an executable .jar file. The problem is, even though I have Java installed, the download has that lifeless piece of paper look and I cannot even get it to open by rightclicking and doing 'open with'. What can I do to install this file. Thanks for any help.