Updating Github desktop

Have Version 2.6.1 when I click Check for updates I get the error

Command failed: 4294967295
System.AggregateException: One or more errors occurred. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Squirrel.Update.Program.<CheckForUpdate>d__8.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at System.Threading.Tasks.Task`1.get_Result()
   at Squirrel.Update.Program.executeCommandLine(String[] args)
   at Squirrel.Update.Program.main(String[] args)
   at Squirrel.Update.Program.Main(String[] args)
---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object.
   at Squirrel.Update.Program.<CheckForUpdate>d__8.MoveNext()<---

Thanks for sharing this @haosun1. Could you try downloading the latest release from https://desktop.github.com and installing again? Let me know if you hit the same error.