.NET Framework error before any elements are rendered

Microstation V8i SS3 8.11.09.608, Geopak SS3 .722

When I open a fresh instance of Microstation. I select the file to work in. All my tools appear and even Civil AccuDraw comes up. And then this error.

************** Exception Text **************
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.ListControl.set_DataSource(Object value)
   at System.Windows.Forms.ComboBox.set_DataSource(Object value)
   at Bentley.DesignLinksApp.ProjectDialog.ReloadProjectPicker(Boolean setActiveProject)
   at Bentley.DesignLinksApp.DesignLinksApp.TreeListSourceChanged(Boolean SynchWithActiveProject)
   at Bentley.DesignLinksApp.DesignLinksApp.OnNewDesignFile(AddIn addIn, NewDesignFileEventArgs __unnamed001)
   at Bentley.MicroStation.AddIn.NewDesignFileEventHandler.Invoke(AddIn sender, NewDesignFileEventArgs eventArgs)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
   at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at Bentley.Internal.MicroStation.EventHandlerSet.Fire(Object eventKey, Object sender, EventArgs e)
   at Bentley.MicroStation.AddIn.raise_NewDesignFileEvent(AddIn sender, NewDesignFileEventArgs eventArgs)
   at Bentley.MicroStation.AddIn.generateNewDesignFileEvent(SByte* filenameP, Int32 when)
   at Bentley.Internal.MicroStation.CoreHook.DispatchNoHandler(UInt32* argStack, UInt32 mysp, IntPtr pFunc)
   at Bentley.Internal.MicroStation.CoreHook.Dispatch(UInt32* argStack, UInt32 mysp, IntPtr pFunc)

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When I click continue, of course the automatic reporting windows come up. And then if I click to ignore, it kind of continues to work normally. One noticeable difference is that there are no civil elements, or at least no corridors nor template drops. This last symptom seems to be caused by something else.

This began just this morning. When I left my computer last night it seemed to be fine.

I've found that this error is raised each time I open a new file.