Update README.md

Author: marijnz

README.md

@@ -8,6 +8,6 @@ _How it looks and works like:_
 ![Imgur](https://i.imgur.com/fMmHDvH.gif)
 
 ## .NET 4.x Runtime support
-If your Unity project is using the .NET 4.x runtime, you'll need to enable the Editor platform for Mono.CSharp.4.x.dll and disable it for Mono.CSharp.3.5.dll by selecting them in the Project view and modifying the Include Platforms in the Inspector.
+If your Unity project is using the .NET 4.x runtime (set in the Player Settings), you'll need to enable the Editor platform for Mono.CSharp.4.x.dll and disable it for Mono.CSharp.3.5.dll by selecting them in the Project view and modifying the Include Platforms in the Inspector.
 
 Inspired by [UniShell](https://github.com/rje/unishell)