Where is the "return license" button ( windows, unity3)

Probably a stupid question, but where the heck is the drop down menu where I can find the “manage license” button? My hard drive is about to crash so I need to migrate my licence right now… (I’m using windows and unity 3)

Help > Manage Licence.

I had Unity 3.5.7f6, so I did’nt have the Manage Licence button. The correct answer is that Untity 3 users needs to contact support to migrate licences.