How to change app icon and app name for Flutter Desktop application?

I think I've found the solution. The following should work for Windows application:

To change application icon: Simply put icon file under windows/runner/resources folder, and change the IDI_APP_ICON part in windows\runner\Runner.rc file to your icon file name.

To change application name: Open windows/runner/main.cpp file, and change your application name inside window.CreateAndShow function.

add this in your void main()

void main() {
WidgetsFlutterBinding.ensureInitialized();
  if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
    setWindowTitle('title here');
  }
  runApp(new MyApp());
}

Include this dependency in pubspec.yaml for this to work:

window_size:
    git:
      url: git://github.com/google/flutter-desktop-embedding.git
      path: plugins/window_size
      ref: 7812516a5c1fc8ef379e244106953a2b534432b9