Update instructions for updating Header Tags SEO version 3.1.5 to
Header Tags SEO V 3.1.6 by Jack_mcs

1) Upload the following files:

catalog/admin/header_tags_seo.php
catalog/admin/header_tags_test.php
catalog/admin/includes/languages/english/header_tags_seo.php
catalog/includes/header_tags.php
catalog/includes/modules/header_tags_social_bookmarks.php
catalog/images/socialbookmark/reddit.png
catalog/images/socialbookmark/furl.png
catalog/images/socialbookmark/twitter.png
catalog/images/socialbookmark/facebook.png

2) In includes/application_top.php, 

FIND:

  } elseif (isset($_GET['manufacturers_id'])) {
    $manufacturers_query = tep_db_query("select manufacturers_htc_title_tag from " . TABLE_MANUFACTURERS_INFO . " where manufacturers_id = '" . (int)$_GET['manufacturers_id'] . "' LIMIT 1");

REPLACE WITH:

  } elseif (isset($_GET['manufacturers_id'])) {
    $manufacturers_query = tep_db_query("select manufacturers_htc_title_tag from " . TABLE_MANUFACTURERS_INFO . " where manufacturers_id = '" . (int)$_GET['manufacturers_id'] . "' AND languages_id = '".(int)$languages_id."' LIMIT 1");
