miznikki on "[Theme: Duena] Full Post"

I have tried all the suggestions on here for making a post Full instead of an excerpt. There is even a choice in the customization for Full Posts or Summaries. This is such a beautiful them, but if I can not get help, I will have to move on. I've created a child theme. Here is what my Standard.php file looks like. Any help would be appreciated.

<article id="post-<?php the_ID(); ?>" <?php post_class('post__holder'); ?>>

<?php
$stickyclass = 'sticky';
get_template_part('post-formats/post-thumb');
?>

<header class="post-header <?php if( is_singular() && is_sticky() ) echo esc_attr( $stickyclass ); ?>">
<?php if ( is_sticky() ) echo "<span class='featured_badge'><i class='icon-pushpin'></i>".__( 'Featured', 'duena' )."</span>"; ?>
<?php if(!is_singular()) : ?>

<h3 class="post-title">" title="<?php esc_attr_e('Permalink to:', 'duena');?> <?php the_title(); ?>"><?php the_title(); ?></h3>

<?php else :?>

<h1 class="post-title"><?php the_title(); ?></h1>

<?php endif; ?>

</header>

<?php if(!is_singular()) : ?>

<!-- Post Content -->
<div class="post_content">
<?php if ( 'false' != of_get_option('post_excerpt')) { ?>
<div class="excerpt">
<?php
$excerpt = get_the_excerpt();
the_content();
?>
</div>
<?php } ?>
<?php
if ( 'false' != of_get_option('post_button')) {
$button_text = of_get_option( 'post_button_txt' );
if ( '' == $button_text ) $button_text = __( 'Read more', 'duena' );
?>
" class="more_link"><?php echo $button_text; ?>
<?php } ?>
</div>

<?php else :?>

<!-- Post Content -->
<div class="post_content">

<?php the_content(''); ?>
<?php
wp_link_pages( array( 'before' => '<div class="page-links">' . __( 'Pages:', 'duena' ), 'after' => '</div>', 'link_before' => '<span>', 'link_after' => '</span>' ) );
?>
</div>
<!-- //Post Content -->
<?php if( has_tag() ) { ?>
<footer class="post-footer">
<i class="icon-tags"></i> <?php the_tags('Tags: ', ' ', ''); ?>
</footer>
<?php } ?>
<?php endif; ?>

<?php get_template_part('post-formats/post-meta'); ?>

</article>

<?php if ( is_single() && get_the_author_meta( 'description' ) ) {
get_template_part( 'post-formats/author-bio' );
} ?>