doc Update install instructions for Hub and Editor

Author: empty-set

VisualPinball.Unity/Documentation~/creators-guide/setup/installing-vpe.md

@@ -13,7 +13,13 @@ In order to start creating or modifying tables with VPE, the first thing you'll
 
 Unity uses an application called *Unity Hub* to update itself, create new projects and provide quick access to them. The install process is straight-forward and documented [here](https://docs.unity3d.com/Manual/GettingStartedInstallingHub.html) if you run into troubles.
 
-When installing Unity, use the latest **2021.3.0f1** version. You can leave all the other options unchecked.
+**2021.3.0** is the latest version supported by VPE so click on *Skip Installation* in the first dialog to avoid installing the newest version of the Editor. After accepting the license agreement you will have access to Unity Hub.
+
+To install the supported version of the editor you can either
+* Paste this direct link into your browser: unityhub://2021.3.0f1/6eacc8284459 
+* Find the correct version from the [Unity release archive](https://unity3d.com/get-unity/download/archive)
+
+You can leave all the other options unchecked during install.
 
 Once Unity is downloaded and installed, you're ready to create a new VPE project. Click on *New Project*, be sure to have selected the 2021.3.0f1 version at the top, and you'll see the following choices: