I wondered what would happen if I tried to open the new NT156 Activites resource in the Courses Tool.
Answer: A crash.
Specifically: Unhandled exception in async work System.InvalidCastException: Unable to cast object of type 'Libronix.DigitalLibrary.Resources.Logos.Controls.LogosDisplayControl' to type 'Libronix.DigitalLibrary.Resources.Media.Display.MediaResourceControl'.