Handbrake Crash after upgrade

After upgrading to Handbrake 1.1.0, handbrake would crash with an empty error details screen:

handbrake-crash

Clicking copy to Clipboard and pasting it in notepad reveals:

An Unknown Error has occurred.
System.NullReferenceException: Object reference not set to an instance of an object.
 at HandBrakeWPF.Utilities.EnumHelper`1.GetDisplay(T value) in D:\HandBrake\win\CS\HandBrakeWPF\Utilities\EnumHelper.cs:line 55
 at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
 at System.Windows.Data.BindingExpression.Activate(Object item)
 at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
 at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
 at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
 at MS.Internal.Data.DataBindEngine.Run(Object arg)
 at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
 at System.Windows.ContextLayoutManager.UpdateLayout()
 at System.Windows.Interop.HwndSource.SetLayoutSize()
 at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
 at System.Windows.Window.SetRootVisual()
 at System.Windows.Window.SetRootVisualAndUpdateSTC()
 at System.Windows.Window.SetupInitialState(Double requestedTop, Double requestedLeft, Double requestedWidth, Double requestedHeight)
 at System.Windows.Window.CreateSourceWindow(Boolean duringShow)
 at System.Windows.Window.ShowHelper(Object booleanBox)
 at HandBrakeWPF.Startup.AppBootstrapper.OnStartup(Object sender, StartupEventArgs e) in D:\HandBrake\win\CS\HandBrakeWPF\Startup\AppBootstrapper.cs:line 112
 at System.Windows.Application.OnStartup(StartupEventArgs e)
 at HandBrakeWPF.App.OnStartup(StartupEventArgs e) in D:\HandBrake\win\CS\HandBrakeWPF\App.xaml.cs:line 79
 at System.Windows.Application.<.ctor>b__1_0(Object unused)
 at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
 at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

The solution is to clear off the %appdata%\handbrake folder:

handbrake-roaming.PNG

After deleting the xml and json files, Handbrake would launch without error.