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AppCenter B15.0916.1 self-update InstUPD fails with .NET runtime error

AppCenter wants to update itself, but the update always fails.

I have tried downloading a new version from the Gigabyte website, but the package is dated 2014, so that's no good.

Here are the errors in EventVWR:

Code: [Select]
Faulting application name: InstUpd.exe, version: 1.0.0.0, time stamp: 0x59802542
Faulting module name: KERNELBASE.dll, version: 10.0.15063.502, time stamp: 0xc3955624
Exception code: 0xe0434352
Fault offset: 0x000eb802
Faulting process ID: 0x2a24
Faulting application start time: 0x01d320b73f3bac32
Faulting application path: C:\Users\jonski\AppData\Local\Temp\7zS9219.tmp\AppCenter\InstUpd.exe
Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
Report ID: baa9bf10-e101-4da1-b46f-b167223c6ab7
Faulting package full name:
Faulting package-relative application ID:


.NET runtime error

Code: [Select]
Application: InstUpd.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NullReferenceException
   at InstUpd.MainWindow.ReadInstalledVer()
   at InstUpd.MainWindow..ctor()

Exception Info: System.Reflection.TargetInvocationException
   at System.RuntimeTypeHandle.CreateInstance(System.RuntimeType, Boolean, Boolean, Boolean ByRef, System.RuntimeMethodHandleInternal ByRef, Boolean ByRef)
   at System.RuntimeType.CreateInstanceSlow(Boolean, Boolean, Boolean, System.Threading.StackCrawlMark ByRef)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean, Boolean, Boolean, System.Threading.StackCrawlMark ByRef)
   at System.Activator.CreateInstance(System.Type, Boolean)
   at System.RuntimeType.CreateInstanceImpl(System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[], System.Threading.StackCrawlMark ByRef)
   at System.Activator.CreateInstance(System.Type, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[])
   at System.Activator.CreateInstance(System.Type, System.Object[])
   at System.Xaml.Schema.SafeReflectionInvoker.CreateInstanceCritical(System.Type, System.Object[])
   at System.Xaml.Schema.SafeReflectionInvoker.CreateInstance(System.Type, System.Object[])
   at System.Xaml.Schema.XamlTypeInvoker.CreateInstance(System.Object[])
   at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstanceWithCtor(System.Xaml.XamlType, System.Object[])
   at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstance(System.Xaml.XamlType, System.Object[])
   at System.Xaml.XamlObjectWriter.Logic_CreateAndAssignToParentStart(MS.Internal.Xaml.Context.ObjectWriterContext)
   at System.Xaml.XamlObjectWriter.WriteStartMember(System.Xaml.XamlMember)
   at System.Xaml.XamlWriter.WriteNode(System.Xaml.XamlReader)
   at System.Windows.Markup.WpfXamlLoader.TransformNodes(System.Xaml.XamlReader, System.Xaml.XamlObjectWriter, Boolean, Boolean, Boolean, System.Xaml.IXamlLineInfo, System.Xaml.IXamlLineInfoConsumer, MS.Internal.Xaml.Context.XamlContextStack`1<System.Windows.Markup.WpfXamlFrame>, System.Windows.Markup.IStyleConnector)
   at System.Windows.Markup.WpfXamlLoader.Load(System.Xaml.XamlReader, System.Xaml.IXamlObjectWriterFactory, Boolean, System.Object, System.Xaml.XamlObjectWriterSettings, System.Uri)
   at System.Windows.Markup.WpfXamlLoader.LoadBaml(System.Xaml.XamlReader, Boolean, System.Object, System.Xaml.Permissions.XamlAccessLevel, System.Uri)
   at System.Windows.Markup.XamlReader.LoadBaml(System.IO.Stream, System.Windows.Markup.ParserContext, System.Object, Boolean)
   at System.Windows.Application.LoadBamlStreamWithSyncInfo(System.IO.Stream, System.Windows.Markup.ParserContext)
   at System.Windows.Application.LoadComponent(System.Uri, Boolean)
   at System.Windows.Application.DoStartup()
   at System.Windows.Application.<.ctor>b__1_0(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Application.RunDispatcher(System.Object)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at System.Windows.Application.Run(System.Windows.Window)
   at InstUpd.App.Main()