Free version activation in 3.5.7

Dear All,

Apologies for the somewhat elementary question, this is my first toe in the water, Unity-wise. Could somebody please tell me how to get the free version working with version 3.5.7 ? I can see the option to use the free version only in the activation window of the latest version but not in 3.5.7.

Any help greatly appreciated…

K

http://docs.unity3d.com/356/Documentation/Manual/InternetActivationHow-To.html