private void Application_Startup(object sender, StartupEventArgs e) { PreferencesHelper.LoadPrefs("preferences.xml"); var ffmpegNotFound = string.IsNullOrWhiteSpace(PreferencesHelper.ffmpegPath); var ffprobeNotFound = string.IsNullOrWhiteSpace(PreferencesHelper.ffprobePath); var ffplayNotFound = string.IsNullOrWhiteSpace(PreferencesHelper.ffplayPath); if (ffmpegNotFound || ffprobeNotFound || ffplayNotFound) { FirstTimeSetup.AutoSetupFFMpeg(); } }