Customize the number of words used when SearchWP's Term Highlight extension builds an excerpt containing at least one search term

gistfile1.php

<?php

function my_searchwp_th_num_words() {
    // use 75 words instead of the default 55
    return 75;
}

add_filter( 'searchwp_th_num_words', 'my_searchwp_th_num_words' );

Is it me, or is this filter no longer working in the latest versions?