So ...

Upon activation, go to Posts => All Posts.

After hovering your mouse over a given post, you'll see two new links that will allow you to clone your post or to create a new draft ...

The "Clone" link will create a duplicate without opening the clone in the post editor.

The "New Draft" link will create the duplicate and will open it in the post editor.

Needless to say, the very same options are available for pages as well.

Now let's see some customization options ...