diff --git a/Changelog.md b/Changelog.md
index af38ff3..e9605bd 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,10 +1,17 @@
 
-5.4.7.2 Beta  (not yet released)
+5.4.7.3 Beta  (not yet released)
 ============
 
-- WM_APPCOMMAND (mpv calls this media-keys) based input is no longer
-  directly passed to mpv but rather handled in mpv.net translating
-  the commands to mpv keys and sent via keypress input command to mpv
+- 
+
+
+5.4.7.2 Beta
+============
+
+- another attempt to fix a app command issue. WM_APPCOMMAND (mpv calls this media keys)
+  based input is no longer directly passed to mpv but rather handled in mpv.net directly
+  translating the native commands to mpv keys and sent via keypress input command to mpv
+- another attempt to fix a crash caused by powershell 5.1 not being installed
 
 
 5.4.7.1 Beta
diff --git a/mpv.net/Misc/PowerShell.cs b/mpv.net/Misc/PowerShell.cs
index 836f606..904d766 100644
--- a/mpv.net/Misc/PowerShell.cs
+++ b/mpv.net/Misc/PowerShell.cs
@@ -233,12 +233,6 @@ namespace mpvnet
             var error = sender as PSDataCollection<ErrorRecord>;
             ConsoleHelp.WriteError(error[e.Index], Module);
         }
-
-        public static void Shutdown()
-        {
-            foreach (PowerShell ps in Instances)
-                ps.Runspace.Dispose();
-        }
     }
 
     public class PowerShellException : Exception
diff --git a/mpv.net/Properties/AssemblyInfo.cs b/mpv.net/Properties/AssemblyInfo.cs
index 88831f2..ceb4a34 100644
--- a/mpv.net/Properties/AssemblyInfo.cs
+++ b/mpv.net/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("5.4.7.1")]
-[assembly: AssemblyFileVersion("5.4.7.1")]
+[assembly: AssemblyVersion("5.4.7.2")]
+[assembly: AssemblyFileVersion("5.4.7.2")]
diff --git a/mpv.net/WinForms/MainForm.cs b/mpv.net/WinForms/MainForm.cs
index 849b2d0..904166a 100644
--- a/mpv.net/WinForms/MainForm.cs
+++ b/mpv.net/WinForms/MainForm.cs
@@ -811,8 +811,6 @@ namespace mpvnet
 
             if (!core.ShutdownAutoResetEvent.WaitOne(10000))
                 Msg.ShowError("Shutdown thread failed to complete within 10 seconds.");
-
-            PowerShell.Shutdown();
         }
 
         protected override void OnMouseDown(MouseEventArgs e)