Why is my Unreal Engine 4.6.0 not Launching?

Hi,
I’ve been having some major problems getting Unreal Engine 4.6.0 to launch. I click the “Launch” button in the launcher and nothing happens. At all. This is a real problem as the team and I really need to get to work on learning the Engine soon. So if anyone has any advice to give me please do so.

Thanks!
Regards,

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