Could not delete vCenter from Virtual Inventory

Hello

I would remove the vCenter from Virtual Inventory in Shavlik Protect 9.1. When I use the delete function, I receive the error "ST.Protect has stopped working", and Shavlik Protect crashes. In the ST.Protect.log I see the following:

2015-04-23T13:55:29.3830187Z 0001 C Launcher.cs:74|System.InvalidOperationException: Crash from main UI thread ---> System.FormatException: Input string was not in a correct format.

   at System.Text.StringBuilder.AppendFormat(IFormatProvider provider, String format, Object[] args)

   at System.String.Format(IFormatProvider provider, String format, Object[] args)

   at ST.Protect.Forms.UserPrompt.PromptToDeleteVirtualServer(IWin32Window owner, IList`1 referencingGroups, CancelEventArgs e)

   at ST.Protect.Forms.Navigator.RemoveVirtualServer[TVirtualServer](Action`1 deleteVirtualServer, TVirtualServer virtualServer, String typeName, NamedItem namedItem, Int32 id)

   at ST.Protect.Forms.Navigator.MiVirtualRemoveClick(Object sender, EventArgs e)

   at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)

   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)

   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)

   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)

   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)

   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ToolStrip.WndProc(Message& m)

   at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

   --- End of inner exception stack trace ---

Does anybody have an idee for me?

Kind Regards

Mario