Minecraft Launcher 1.3.7 starts up, I click play, and the launcher immediately displays the crash tab.

Put the summary of the bug you're having here

What I expected to happen was...:
I thought that Minecraft would launch normally so I could play

What actually happened was...:
Instead of launching, I was given the Minecraft crash screen.

Steps to Reproduce:
1. Click on Minecraft applet
2. Click on "Play" button

Description: Initializing game

java.lang.NullPointerException: Initializing game
	at azd.a(SourceFile:502)
	at azd.Z(SourceFile:340)
	at azd.e(SourceFile:689)
	at net.minecraft.client.main.Main.main(SourceFile:103)