Runway problem...

[mgalaxy]

Could you please erase (make a backup if necessary) the content of  "C:\Users\'YourName'\AppData\Roaming\mGalaxy" (with 'YouName' being your user name on the computer)
...then start mGalaxy_Runway again or proceed to a fresh install then run)

[groboxone]

Thank you for your answer.

 I've tried a new install, but i've got the same problem :  Runway can't be launched...

[mgalaxy]

You can't launch at all even on a new install?

[groboxone]

I've got a problem : I cant' launch mGalaxy Runway...

Time: 10/02/2019 06:08:06
-----------------------------------------------------------
mGalaxy_Runway started!
-----------------------------------------------------------

Time: 10/02/2019 06:08:06
-----------------------------------------------------------
Message: La référence d'objet n'est pas définie à une instance d'un objet.
StackTrace:    à (MainWindow , UserSystem )
   à mGalaxy_Runway.MainWindow.FeedListView(UserSystem us)
   à (MainWindow , Object , SelectionChangedEventArgs )
   à mGalaxy_Runway.MainWindow.ListBox5_SelectionChanged(Object sender, SelectionChangedEventArgs e)
   à System.Windows.Controls.SelectionChangedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   à System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   à System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   à System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   à System.Windows.Controls.ListBox.OnSelectionChanged(SelectionChangedEventArgs e)
   à System.Windows.Controls.Primitives.Selector.InvokeSelectionChanged(List`1 unselectedInfos, List`1 selectedInfos)
   à System.Windows.Controls.Primitives.Selector.SelectionChanger.End()
   à System.Windows.Controls.Primitives.Selector.SelectionChanger.SelectJustThisItem(ItemInfo info, Boolean assumeInItemsCollection)
   à System.Windows.Controls.Primitives.Selector.SetSelectedToCurrent()
   à System.Windows.Controls.Primitives.Selector.OnItemsChanged(NotifyCollectionChangedEventArgs e)
   à System.Windows.Controls.ItemsControl.OnItemCollectionChanged2(Object sender, NotifyCollectionChangedEventArgs e)
   à System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   à System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   à System.Windows.Controls.ItemCollection.SetCollectionView(CollectionView view)
   à System.Windows.Controls.ItemCollection.SetItemsSource(IEnumerable value, Func`2 GetSourceItem)
   à System.Windows.Controls.ItemsControl.OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   à System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   à System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   à System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   à System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   à System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   à System.Windows.Controls.ItemsControl.set_ItemsSource(IEnumerable value)
   à (MainWindow , Object , RoutedEventArgs )
   à mGalaxy_Runway.MainWindow.MainWindow_Loaded(Object sender, RoutedEventArgs e)
   à System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   à System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   à System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent)
   à System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(Object root)
   à MS.Internal.LoadedOrUnloadedOperation.DoWork()
   à System.Windows.Media.MediaContext.FireLoadedPendingCallbacks()
   à System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   à System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   à System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   à System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget)
   à System.Windows.Interop.HwndTarget.OnResize()
   à System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam)
   à System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   à MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   à MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   à System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   à System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
Source: mGalaxy_Runway
TargetSite: Void (mGalaxy_Runway.MainWindow, mGalaxy_Runway.UserSystem)
-----------------------------------------------------------

Thank you for your help!!!