ETS2 - What is Promods, how to register, download, extract and install it

I am using Promods 2.33 in this video but the registration, download, extraction and installation is the same for Promods 2.40

Promods 2.40 require all 5 map DLCs!

For a list of map DLCs required for earlier versions, please use this link

https://www.promods.net/compat.php

This FAQ goes through every single step of the process from how to register to how to add it to your profile.