How do I activate my 30-day free trial of Unity Pro?

I need to activate the free trial, to see what Pro is like, but I can’t find how to activate it. I’ve tried opening it, but the message doesn’t come up to activate it.

In the editor:

Help → Manage License, then click the “Activate New License”-button. It will open this window:

This works fine on my machine, however, you have to be patient sometimes… It can take a really long time to load. It has to exchange data with Unity’s License system, and the server for that seems like it might be a little over-taxed, I guess.

If this doesn’t work, you need to file a support request with Unity themselves.

Yeah would be good if there was this option