How do I see if my current Unity installation is a free or pro version?
Help menu… About Unity… at the bottom of the window is the license type.
No reading needed, if it’s ugly then it’s the free version.
The About Unity was located in the menu → Unity (running Mac so that might be the difference).
But it just states
License type: Unity
Nothing about free or pro 
Unity without anything is the free unity (free is not mentioned in the name, there is only Unity and Unity Pro)
Thanks, and I need pro version to add DLL’s libraries?