Keep a backup of any wordpress plugin before installing a new update. Each backup is saved on the website and the user can download it, in case it's required!
Your are website is your biggest asset in building your business online. And it is also one of the targets to many hackers to make your business down.
That's why, having an automated backup to your website is necessary. If you are using WordPress, backing up your website should be easy using this amazing plugin called Quick Plugin Backup.