I downloaded a free version of Unity on 2019-05-10 so that I can learn Unity. I get this error: Assets/Scripts/myscript.cs(2,19): error CS0234: The type or namespace name `SceneManagement' does not exist in the namespace `UnityEngine'. Are you missing an assembly reference? Line 2 of the script contains: using UnityEngine.SceneManagement; In the Unity Editor, Help.About shows Unity Version 5.0.0f4 Personal (c) 2015. I know that Unity 5.3 exists and possibly beyond that. I tried downloading the latest version, but About still displays 5.00f4. Giving that I am using a free version of Unity, is there any way I can update to a new version to get access to SceneManagement?