Hi

I recently installed Plan G v3.1.2.101 on my Windows 8.1 laptop. I installed it by right-clicking and running as administrator and I installed it to C:\FSX

During the course of learning how to use it I opened and closed the application many times without issue.

I was able to graphically create a flight plan and save it but as soon as I tried to open the flight plan using the icon in the ribbon (to get the little grid view) the application crashed with a 'Plan_G3 has stopped working' error.
I can't open the application at all now. When I try, I get the splash screen, followed by 2 small empty windows and then it crashes with the same error.

Looking at the windows logs I get 2 errors:

1) a .NET runtime error as follows

Application: Plan-G3.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info: System.NullReferenceException Stack: at System.Windows.Controls.Primitives.DataGridColumnHeader.PrepareColumnHeader(System.Object, System.Windows.Controls.DataGridColumn) at System.Windows.Controls.Primitives.DataGridColumnHeadersPresenter.PrepareContainerForItemOverride(System.Windows.DependencyObject, System.Object) at System.Windows.Controls.ItemsControl.MS.Internal.Controls.IGeneratorHost.PrepareItemContainer(System.Windows.DependencyObject, System.Object) at System.Windows.Controls.ItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(System.Windows.DependencyObject) at System.Windows.Automation.Peers.RecyclableWrapper.LinkItem(System.Object) at System.Windows.Automation.Peers.ItemsControlAutomationPeer.GetRecyclableWrapperPeer(System.Object) at System.Windows.Automation.Peers.ItemAutomationPeer.GetNameCore() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.ContextLayoutManager.fireAutomationEvents() at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.ContextLayoutManager.UpdateLayoutCallback(System.Object) at System.Windows.Media.MediaContext+InvokeOnRenderCallback.DoWork() at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() at System.Windows.Media.MediaContext.RenderMessageHandlerCore(System.Object) at System.Windows.Media.MediaContext.RenderMessageHandler(System.Object) at System.Windows.Media.MediaContext.Resize(System.Windows.Media.ICompositionTarget) at System.Windows.Interop.HwndTarget.OnResize() at System.Windows.Interop.HwndTarget.HandleMessage(MS.Internal.Interop.WindowMessage, IntPtr, IntPtr) at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(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 MS.Internal.Threading.ExceptionFilterHelper.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.ShowWindow(System.Runtime.InteropServices.HandleRef, Int32) at System.Windows.Window.ShowHelper(System.Object) at System.Windows.Window.Show() at Plan_G3.MainWindow.showPlanToolWindow() at Plan_G3.MainWindow.openToolWindowsOnStartup() at Plan_G3.MainWindow.RibbonWindow_Loaded(System.Object, System.Windows.RoutedEventArgs) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean) at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs) at System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs) at System.Windows.BroadcastEventHelper.BroadcastEvent(System.Windows.DependencyObject, System.Windows.RoutedEvent) at System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(System.Object) at MS.Internal.LoadedOrUnloadedOperation.DoWork() at System.Windows.Media.MediaContext.FireLoadedPendingCallbacks() at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() at System.Windows.Media.MediaContext.RenderMessageHandlerCore(System.Object) at System.Windows.Media.MediaContext.RenderMessageHandler(System.Object) at System.Windows.Media.MediaContext.Resize(System.Windows.Media.ICompositionTarget) at System.Windows.Interop.HwndTarget.OnResize() at System.Windows.Interop.HwndTarget.HandleMessage(MS.Internal.Interop.WindowMessage, IntPtr, IntPtr) at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(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 MS.Internal.Threading.ExceptionFilterHelper.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.CallWindowProc(IntPtr, IntPtr, Int32, IntPtr, IntPtr) at MS.Win32.HwndSubclass.DefWndProcWrapper(IntPtr, Int32, IntPtr, IntPtr) at MS.Win32.UnsafeNativeMethods.CallWindowProc(IntPtr, IntPtr, Int32, IntPtr, IntPtr) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr) at MS.Win32.UnsafeNativeMethods.SetWindowPos(System.Runtime.InteropServices.HandleRef, System.Runtime.InteropServices.HandleRef, Int32, Int32, Int32, Int32, Int32) at System.Windows.Window.UpdateHwndSizeOnWidthHeightChange(Double, Double) at System.Windows.Window.UpdateWidth(Double) at System.Windows.Window.OnWidthChanged(Double) at System.Windows.Window._OnWidthChanged(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs) at System.Windows.PropertyChangedCallback.Invoke(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs) at System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs) at System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs) at System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs) at System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex, System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EffectiveValueEntry, System.Windows.EffectiveValueEntry ByRef, Boolean, Boolean, System.Windows.OperationType) at System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty, Boolean) at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean) at System.Windows.Data.BindingExpression.TransferValue(System.Object, Boolean) at System.Windows.Data.BindingExpression.Activate(System.Object) at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt) at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean) at MS.Internal.Data.DataBindEngine+Task.Run(Boolean) at MS.Internal.Data.DataBindEngine.Run(System.Object) at MS.Internal.Data.DataBindEngine.OnLayoutUpdated(System.Object, System.EventArgs) at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent() at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.UIElement.UpdateLayout() at System.Windows.Interop.HwndSource.SetLayoutSize() at System.Windows.Interop.HwndSource.set_RootVisualInternal(System.Windows.Media.Visual) at System.Windows.Interop.HwndSource.set_RootVisual(System.Windows.Media.Visual) at System.Windows.Window.SetRootVisual() at System.Windows.Window.SetRootVisualAndUpdateSTC() at System.Windows.Window.SetupInitialState(Double, Double, Double, Double) at System.Windows.Window.CreateSourceWindow(Boolean) at System.Windows.Window.CreateSourceWindowDuringShow() at System.Windows.Window.SafeCreateWindowDuringShow() at System.Windows.Window.ShowHelper(System.Object) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32) at MS.Internal.Threading.ExceptionFilterHelper.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 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 MS.Internal.Threading.ExceptionFilterHelper.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.Threading.Dispatcher.Run() at System.Windows.Application.RunDispatcher(System.Object) at System.Windows.Application.RunInternal(System.Windows.Window) at System.Windows.Application.Run(System.Windows.Window) at Plan_G3._Main.Main()

2) and an application error as follows:

Faulting application name: Plan-G3.exe, version: 3.1.2.101, time stamp: 0x54aaa0ff
Faulting module name: PresentationFramework.ni.dll, version: 4.0.30319.34209, time stamp: 0x5348b261
Exception code: 0xc0000005
Fault offset: 0x00c7d7d3
Faulting process id: 0x1f24
Faulting application start time: 0x01d06b2fe562586c
Faulting application path: C:\Plan_G Installation\Plan-G v3.1.2\Plan-G3.exe
Faulting module path: C:\WINDOWS\assembly\NativeImages_v4.0.30319_32\Presentatio5ae0f00f#\4136b9a7a05c8f0e2c7e15600bc20b1b\PresentationFramework.ni.dll
Report Id: 2759850a-d723-11e4-bfdf-0c8bfdba5cbf
Faulting package full name:
Faulting package-relative application ID:

Any help in understanding how to fix this would be great as I love the videos I have watched on the app and really want to start using it.

Thanks