After downloading the 1.6.1 update, I cant play minecraft anymore but I can still go on it but with Minecraft Launcher. When I go on minecraft launcher, it says the minecraft has crashed and sometimes when i click on the minecraft, it pops up the net.minecraft.LauncherFrame version. Most of the times, it pops up the minecraft launcher version which makes my minecraft crash. Can anyone please fix this problem and if it's already been fix, please teach me how.