Laucher 1.4.4

Summary:
!!!: I'm french so I don't speek very well english, sorry.

What I expected to happen was...:
I set my option account with the version I wantet to use, the closing of the launcher after that the game start and if I wanted snapshot or not (I wanted some). I expected that when I will click on the "play" button in the middle of the launcher the game will start.

What actually happened was...:
I bought the game and I play Minecraft since 2-3 years and I never had this bug laucher, the game were running perfectly. And I had the bug for the first time 3-4 month ago. I set my option normally and when I click on the "play" button the laucher close and re-opened but the game don't start.

This is the message on the development console:
----) In the doc below.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
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