How To Update
- Download the latest PHPmailer's master ZIP archive from GitHub. https://github.com/PHPMailer/PHPMailer/archive/master.zip
- Extract the files class.phpmailer.php, class.pop3.php, class.smtp.php and PHPMailerAutoload.php
- Log on to your hosting account (via SFTP or your control panel)
- Overwrite/replace the files in your hosting space with the new ones. Look for any third party scripts you have installed, and you will find the phpmailer directory