You should always have a backup.
Your shop could be damaged by everything – malware infection, crazy developers, hosting problems etc. But if you have an up-to-date backup, then you are safe.
Author: Alex C.
How to configure PrestaShop module
How to access module settings page? Just open Back Office and choose “Modules” in the main menu.
It may look a bit different in different PrestaShop versions.
For example, in PrestaShop 1.6 it looks this way: