public static void CheckAndFixDefaultLauncher(string acRoot) {
var acLauncher = FileUtils.GetAcLauncherFilename(acRoot);
var acLauncherBackup = acLauncher + "~at_bak";
if (File.Exists(acLauncherBackup)) {
FileUtils.Recycle(acLauncher);
File.Move(acLauncherBackup, acLauncher);
}
}
}