The below exception is thrown when upgrading using latest Telerik UI for ASP.NET MVC extension.

Failed to execute command.

System.NotImplementedException: Not implemented (Exception from HRESULT: 0x80004001 (E_NOTIMPL)) 
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) 
at Microsoft.VisualStudio.CommonIDE.Solutions.Dte.DteGenericProject.GetFileName() 
at Telerik.VSX.Internal.VisualStudio.VisualStudioThreadHelper.<>c__DisplayClass1_0`1.<<RunInMainThread>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown --- 
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread() 
at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread() 
at Telerik.VSX.NuGet.NuGetPackageService.GetInstalledPackage(Project project, String packageName, Boolean isPackageNamePartial, Boolean ignoreCapabilityMatchCheck) 
at Telerik.VSX.Web.Helpers.ProjectWrap.GetMvcVersion() 
at Telerik.VSX.Web.Helpers.ProjectWrap.CheckIsProjectSupported() 
at Telerik.KendoUI.Mvc.VSX.Helpers.KendoUIMvcProjectWrap.CheckIsProjectSupported() 
at Telerik.KendoUI.Mvc.VSX.Helpers.ProjectSearcher.FilterTelerikSupportedLanguageProjects(List`1 projectsList) 
at Telerik.VSX.Internal.VisualStudio.VisualStudioThreadHelper.<>c__DisplayClass1_0`1.<<RunInMainThread>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown --- 
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread() 
at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread() 
at Telerik.KendoUI.Mvc.VSX.Helpers.ProjectSearcher.GetTelerikEnabledProjectsByMainAssemblyMvcVersion(TargetMvcVersion mvcVersion) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.ShouldShowTargetMvcPage(TargetMvcVersion targetMvcVersion) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.GetProjectUpgradePreWizardData(IScenarioDef template) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.ProjectUpgrade(IPropertyDataDictionary additionalPreWizardData) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.StreamlinedProjectConfiguration.StartUpgradeWizard() 
at Telerik.VSX.VSPackage.PackageBase.CommandCallback(Object sender, EventArgs e)