The WindowAnimation property was present by Q2, but the animation functionality was removed from the control template 8 months ago. That's why we removed the property with Q2. Unfortunately it was not included in the release history by mistake and I apologize for the inconvenience.
The PinMode property was deprecated and now it does not display the Pin button, if it is set to Pin. To prevent the window from moving I would recommend using the CanMove property, however no UI will be displayed.
We decided to drop the Pin UI because if a user wants to prevent a window from moving, he could just not move it, and if the developer wants to prevent his users from moving a window he can set the CanMove property to false, which is more descriptive than PinMode. If this functionality is crucial for you, we could create an example, demonstrating how to display a button at the Window header that would toggle the RadWindow CanMove property, providing the same UI.
All the best,
the Telerik team