Samba crashes trying to edit ticket lister

Hi,

Anyone help me identify the issue here? Samba keeps crashing everytime i right click my ticket lister and click “design mode”. Would prefer to be able to edit it rather than make the whole thing again.

Kind regards as always.
-----------------------------
[General Info]

        Application: SambaPOS
        Version:     5.1.58
        Region:      en
        DB:          SQ
        Machine:     
        User:        
        Date:        19/03/2016
        Time:        01:01

        User Explanation:

        said
        -----------------------------

        [Exception Info 1]

        Top-level Exception
        Type:        System.InvalidOperationException
        Message:     Sequence contains more than one element
        Source:      System.Core
        Stack Trace: at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
           at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2[TResult](IEnumerable`1 sequence)
           at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
           at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
           at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source)
           at Samba.Infrastructure.Data.SqlData.EFWorkspace.Single[T](Expression`1 expression, Expression`1[] includes)
           at Samba.Services.Implementations.EntityModule.EntityService.LoadWidgets(String selectedEntityScreen)
           at Samba.Modules.EntityModule.EntityDashboardViewModel.LoadTrackableEntityScreenItems()
           at Samba.Modules.EntityModule.EntityDashboardView.CommandBinding_Executed(Object sender, ExecutedRoutedEventArgs e)
           at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
           at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
           at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
           at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
           at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
           at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)
           at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
           at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
           at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
           at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
           at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
           at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
           at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
           at System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)
           at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
           at System.Windows.Controls.MenuItem.InvokeClickAfterRender(Object arg)
           at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
           at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
           at System.Windows.Threading.DispatcherOperation.InvokeImpl()
           at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
           at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
           at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
           at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
           at System.Windows.Threading.DispatcherOperation.Invoke()
           at System.Windows.Threading.Dispatcher.ProcessQueue()
           at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
           at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
           at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
           at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
           at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
           at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
           at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
           at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
           at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
           at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
           at System.Windows.Threading.Dispatcher.Run()
           at System.Windows.Application.RunDispatcher(Object ignore)
           at System.Windows.Application.RunInternal(Window window)
           at System.Windows.Application.Run(Window window)
           at Samba.Presentation.App.Main()

        -----------------------------

        [Assembly Info]

        mscorlib, Version=4.0.0.0
        DevExpress.Xpf.LayoutControl.v14.1, Version=14.1.11.0
        System.Xml, Version=4.0.0.0
        DevExpress.Xpf.Grid.v14.1, Version=14.1.11.0
        System, Version=4.0.0.0
        DevExpress.Xpf.Grid.v14.1.Core, Version=14.1.11.0
        WindowsBase, Version=4.0.0.0
        System.Xaml, Version=4.0.0.0
        Samba.Domain, Version=1.0.0.0
        System.Core, Version=4.0.0.0
        PresentationFramework, Version=4.0.0.0
        Samba.Infrastructure, Version=1.0.0.0
        Microsoft.Practices.Prism, Version=4.0.0.0
        System.Runtime.Serialization, Version=4.0.0.0
        Microsoft.Practices.Prism.MefExtensions, Version=4.0.0.0
        System.ComponentModel.Composition, Version=4.0.0.0
        PresentationCore, Version=4.0.0.0
        DevExpress.Xpf.Core.v14.1, Version=14.1.11.0
        Samba.Services, Version=1.0.0.0
        Samba.Presentation.Services, Version=1.0.0.0
        System.Windows.Forms, Version=4.0.0.0
        System.Drawing, Version=4.0.0.0
        Stateless, Version=1.0.0.0
        Samba.Persistance, Version=1.0.0.0
        PropertyTools, Version=2012.4.14.1
        Samba.Localization, Version=1.0.0.0
        ReachFramework, Version=4.0.0.0
        Samba.Infrastructure.Data, Version=1.0.0.0
        EntityFramework, Version=6.0.0.0
        FluentValidation, Version=3.4.0.0
        Omu.ValueInjecter, Version=2.3.0.0
        Microsoft.Practices.ServiceLocation, Version=1.0.0.0
        Microsoft.CSharp, Version=4.0.0.0

        -----------------------------

        [System Info]

        Operating System
        -Microsoft Windows 7 Ultimate
        --CodeSet = 1252
        --CSDVersion = Service Pack 1
        --CurrentTimeZone = 0
        --FreePhysicalMemory = 840608
        --OSArchitecture = 32-bit
        --OSLanguage = 1033
        --ServicePackMajorVersion = 1
        --ServicePackMinorVersion = 0
        --Version = 6.1.7601

        Machine
        -ROUTE34
        --Manufacturer = Dell Inc.
        --Model = OptiPlex 780                 
        --TotalPhysicalMemory = 2092552192
        --UserName = 

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Just ended up remaking it. Seems fine now