Websites offering "Wallpaper Engine Free Download (v1.4.180)" are distributing illegal, cracked copies of the software [1]. Downloading these files poses several severe risks:
To use Wallpaper Engine safely and get access to all its features, you should purchase it through official channels: Download and install the client. Search for Wallpaper Engine in the Steam Store.
Cracked versions cannot access the Steam Workshop [1]. You lose access to the library of millions of wallpapers that make the app worth owning [1, 2].
Wallpaper Engine is a premium, paid application available exclusively on and the Humble Store for Windows [2]. It costs around $3.99 USD (prices vary by region) [2].