Featured Image Caption 0.8.1

I am using Featured Image plugin with Happenstance theme but i receive the following error message on activation:

Warning: Creating default object from empty value in /web/htdocs/www.italiansystem.net/home/wordpress/wp-content/plugins/featured-image-caption/classes/Option.php on line 194

Fatal error: Cannot use object of type stdClass as array in /web/htdocs/www.italiansystem.net/home/wordpress/wp-content/plugins/featured-image-caption/classes/Option.php on line 194