Ah gotcha.
Try this function:
add_filter( 'wpsp_read_more_output', 'tu_alter_read_more' );
function tu_alter_read_more() {
printf( '<div class="wpsp-read-more"><a title="%1$s" href="%2$s">%3$s</a></div>',
the_title_attribute( 'echo=0' ),
esc_url( get_permalink() ),
'Read more'
);
}
