You could do this by customizing the code in:
/includes/modules/pages/account_history_info/header_php.php

with the code in RED:
Code:
if (!isset($_GET['order_id']) || (isset($_GET['order_id']) && !is_numeric($_GET['order_id']))) {
  zen_redirect(zen_href_link(FILENAME_ACCOUNT_HISTORY, '', 'SSL'));
}

// bof: reset download
if ($_GET['update'] > 0) {
  global $db;
  $sql = "UPDATE " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . "
          SET download_maxdays= '" . DOWNLOAD_MAX_DAYS . "', download_count= '" . DOWNLOAD_MAX_COUNT . "'
          WHERE orders_products_download_id= '" . (int)$_GET['id'] . "'";
  $db->Execute($sql);
  $messageStack->add_session('header', 'Download has been updated, please retry ...', 'caution');
  zen_redirect(zen_href_link(FILENAME_ACCOUNT_HISTORY_INFO, 'order_id=' . (int)$_GET['order_id'], 'SSL'));
}
// eof: reset download

$customer_info_query = "SELECT customers_id
                        FROM   " . TABLE_ORDERS . "
                        WHERE  orders_id = :ordersID";
and, using your templates and overrides, customize the code for:
/includes/templates/your_templates_dir/templates/tpl_modules_downloads.php

with the code in RED:
Code:
      <td class="centeredContent"><?php echo ($is_downloadable) ? '<a href="' . zen_href_link(FILENAME_DOWNLOAD, 'order=' . $last_order . '&id=' . $downloads->fields['orders_products_download_id']) . '">' . zen_image_button(BUTTON_IMAGE_DOWNLOAD, BUTTON_DOWNLOAD_ALT) . '</a>' : '<a href="' . zen_href_link(FILENAME_ACCOUNT_HISTORY_INFO, 'order_id=' . $last_order . '&id=' . $downloads->fields['orders_products_download_id'] . '&update=1') . '">' . zen_image_button(BUTTON_IMAGE_DOWNLOAD, BUTTON_DOWNLOAD_ALT) . '</a>'; ?></td>