I noticed that this err still remain in the last version .40 , and each time the HeB start this err shows , so I post it. My OS is win7SP1 X64. THX. Exception while checking for updates! System.InvalidOperationException: The calling thread must be STA, because many UI components require this. at System.Windows.Input.InputManager..ctor() at System.Windows.Input.InputManager.GetCurrentInputManagerImpl() at System.Windows.Input.KeyboardNavigation..ctor() at System.Windows.FrameworkElement.FrameworkServices..ctor() at System.Windows.FrameworkElement.EnsureFrameworkServices() at System.Windows.FrameworkElement..ctor() at System.Windows.Controls.Control..ctor() at System.Windows.Window..ctor() at Hearthbuddy.UpdateWindow..ctor(String filter) at ..(MainWindow ) Initializing Triton...