A possibility to add or overwrite WP Options in the wp_options table.
It is not that easy or nearly impossible to search and replace settings within (plugin) options because they are stored as serialised objects or arrays that get unserialised during the search and replace process of WP Migrate. So setting an 'on' to 'off' is not possible because it will replace things globally.
Here I suggest a static overwriting of the complete value (or inserting when the entry does not exist). But it would be also a nice feature when you could do a search and replace within a option_value focused on one option_name.