Errors clicking the Automation button: "Could not load file or assembly 'MailBee.NET, Version=6.5.2.236 ... or one of its dependencies." and "The type initializer for ... threw an exception.". (4246541)

When clicking on the Automate button to create a new automation script, the following error is returned.

System.TypeInitializationException
The type initializer for 'Quest.Toad.Workflow.Activities.SendEmailActivity' threw an exception.
Stack Trace:
   at Quest.Toad.Workflow.Activities.SendEmailActivity..ctor()
   at Quest.Toad.Workflow.UI.Designer.AddDefaultErrorHandling(String xoml)
   at Quest.Toad.Workflow.UI.Designer.SetUpErrorHandlingAndLogging(String xoml)
   at Quest.Toad.Workflow.UI.Designer.LoadWorkflow(String xoml)
   at Quest.Toad.Automation.AutomationForm.AutomationForm_Load(Object sender, EventArgs e)
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.Windows.Forms.UserControl.OnLoad(EventArgs e)
   at System.Windows.Forms.UserControl.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.UserControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

and

System.IO.FileNotFoundException
Could not load file or assembly 'MailBee.NET, Version=6.5.2.236, Culture=neutral, PublicKeyToken=cd85b70fb26f9fc1' or one of its dependencies. The system cannot find the file specified.
Stack Trace:
   at Quest.Toad.Workflow.Activities.SendEmailActivity..cctor()