WordPress.org

1. Download "Post Format Control" plugin.
2. Open /wp-content/plugins folder at your web server.
3. Upload the folder "post-format-control" there.
4. Goto Plugins page in your wordpress back office.
5. Activate "Post Format Control" plugin.
6. Go to Settings >> Post Format Control for modifying the settings.

Note: This plugin will require one time free registration.