So I’ve been thinking of buying the license of Unity3d for some time. I’m currently working on a game that’s pretty much finished and I’d like to finish it with Unity 4.x.x version before switching to Unity 5. So if I buy the license for the new Unity 5 can I use it with my Unity 4 too?
Yes you can. The same license is also working for Unity 4.
At least that was the scenario when i was buying license for Unity 4, when i was finishing a game with unity 3.5.