How to update.
1) Launch your minecraft game using the link here.
2) At Main Menu hit Options and Texture Packs then open Texture Pack Folder
3) A folder should open up look for the little icon with a folder and a green arrow pointing up hit that until you see a folder that says .minecraft but before doing that look for a folder that says saves and move that to your desktop that backsup your saves
4) Once you see that folder close your internet browser and then delete your .minecraft folder do not close the window with all the folders youll need it for this next part
5) Launch the game one more time let it download your .minecraft folder again
6) On the window where the folder is open it and drag and drop your saves folder in there and your done you should have all your maps from before and a update minecraft.
