Hi Matt Brewington,
We made some changes around the RadUpload's UI related code. The new UI related code is now using the Visual State Manager rather than accessing the elements in the template from code. The SetInitialUIState method can be replaced either by calling the CancelUpload() method or using the VisualStateManager.GoToState(..., "Initial", ...); and clearing the items in the Items collection.
the Telerik team
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