As this is a scene release, the update is designed to be applied to an existing installation of the game.
What or crash behavior are you seeing? Are you trying to play solo or multiplayer co-op ?
With the update installed, you finally have access to the core features that made this patch so highly anticipated.
Despite the improvements, no update is perfect. Users have reported the following lingering bugs:
: The settings interface has been redesigned for smoother navigation, making it easier to manage your bindings and game configurations.
Patch Notes – Version 1.8.4 · Chained Together ... - SteamDB
The tag refers to a specific scene group that released a standalone version of this update for the PC community. These releases typically include the full game patched to the current version, along with instructions for mounting the .iso and applying the crack to play. System Requirements Chained Together on Steam