Set the exact number of featured posts to display

Hi,

Thanks for the great plugin. (I mean many thanks really)

Since every featured post takes 2X width of a regular post in the widget, And I currently set the plugin to load posts randomly, The final view would be great when two featured posts are displayed among the posts. So when the plugin loads only 1 featured post or 3, there will be white space and the final view looks untidy.
Is there currently a way to specify the number of featured posts which will be loaded? Or a quick code fix that I can do myself?

Here’s my shortcode that is used in a text widget:

[lptw_recentposts layout="grid-medium" category_id="220" orderby="rand" posts_per_page="7" excerpt_show="true" excerpt_lenght="25" background_color="#5eb9db" text_color="#ffffff" show_date="false" show_time="false" reverse_post_order="false" color_scheme="dark" no_thumbnails="hide" min_height="250" height="300" featured_height="300" ]