Sometimes if to click any unstaged file for preview - the app crashes.

Event Viewer logs are:

Application: SourceTree.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.InvalidOperationException
   at DynamicData.Kernel.OptionExtensions.ValueOrThrow[[DynamicData.Kernel.ItemWithIndex`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], DynamicData, Version=6.13.0.0, Culture=neutral, PublicKeyToken=null]](DynamicData.Kernel.Optional`1<DynamicData.Kernel.ItemWithIndex`1<System.__Canon>>, System.Func`1<System.Exception>)
   at DynamicData.List.Internal.Filter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Process(DynamicData.ChangeAwareList`1<ItemWithMatch<System._Canon>>, DynamicData.IChangeSet`1<ItemWithMatch<System._Canon>>)
   at System.Reactive.Linq.ObservableImpl.Select`2+Selector+[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnNext(System._Canon)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Reactive.Stubs+<>c.<.cctor>b__2_1(System.Exception)
   at System.Reactive.ObserverBase`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnError(System.Exception)
   at System.Reactive.AutoDetachObserver`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnErrorCore(System.Exception)
   at System.Reactive.ObserverBase`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnError(System.Exception)
   at System.Reactive.Sink`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ForwardOnError(System.Exception)
   at System.Reactive.Sink`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ForwardOnError(System.Exception)
   at System.Reactive.Concurrency.Synchronize`1+_[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnError(System.Exception)
   at System.Reactive.Sink`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ForwardOnError(System.Exception)
   at System.Reactive.ObserveOnObserverNew`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].DrainStep(System.Collections.Concurrent.ConcurrentQueue`1<System.__Canon>)
   at System.Reactive.ObserveOnObserverNew`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].DrainShortRunning(System.Reactive.Concurrency.IScheduler)
   at System.Reactive.Concurrency.DispatcherScheduler+<>c_DisplayClass12_0`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<Schedule>b_0()
   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 MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(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.Application.RunDispatcher(System.Object)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at SourceTree.App.Main()

and

Faulting application name: SourceTree.exe, version: 3.4.26.0, time stamp: 0x68d0f19c
Faulting module name: KERNELBASE.dll, version: 10.0.26100.6899, time stamp: 0x761b8f73
Exception code: 0xe0434352
Fault offset: 0x00000000000c804a
Faulting process id: 0x40CC
Faulting application start time: 0x1DC3E6B0C98ADDF
Faulting application path: C:\Users\rro\AppData\Local\SourceTree\app-3.4.26\SourceTree.exe
Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
Report Id: 2c5b7725-ff86-45ce-b706-6d6ccf09223f
Faulting package full name: 
Faulting package-relative application ID: