How would I do that? I'm using a clean .jar. Sorry, I'm a bit of a n00b. I'm used to the old forge.
Edit: I updated them, but a new problem: When I start up Minecraft, it is stuck at the "Updating Minecraft" screen. Help?
Edit2: I deleted the entire .minecraft folder, and know its stuck at the "Forge has to do a few things before you can play!" thingy... It just says "Currently Doing..." Help?