For older themes prior to framework 2.5, this will put the "Featured Image Display" option for single posts back how it was before. Theme framework will still handle this meta option as before.

post-options-legacy.php

<?php
/**
 * For older themes prior to framework 2.5, this 
 * will put the "Featured Image Display" option 
 * for single posts back how it was before. Theme 
 * framework will still handle this meta option 
 * as before.
 */
function theme_post_meta( $setup ) {

	$setup['options']['tb_thumb']['options']['full'] = __( 'Show full-width featured image', 'themeblvd' );

	$new = array();

	foreach ( $setup['options']['tb_thumb']['options'] as $key => $value ) {

		$new[$key] = $value;

		if ( $key == 'default' ) {
			$new['small'] = __( 'Show small featured image', 'themeblvd' );
		}

	}

	$setup['options']['tb_thumb']['options'] = $new;

	return $setup;
}
add_filter( 'themeblvd_post_meta', 'theme_post_meta' );