How to keep playing pre-1.3 on Steam

[doubleDizz]

A lot of people will have already figured this out, but in case you haven't: It's just a simple work-around to get past the Steam notification error that occurs when trying to run pre-1.3 Fallout on Steam in Offline Mode.

NB: This will only work if you have not finished downloading the 1.3 update.

1. With Steam open, check when the FO4 patch download initiated.
   
2. Change Steam to "Go Offline" mode. Exit Steam.
   
3. Go to your Steam root directory (wherever you originally installed it), then go to \steamapps\downloading folder and delete any files and folders corresponding to the date the FO4 update began.
   
   WARNING: Deleting the wrong file could delete updates for other games. So if you're 20GB into a new download, be very careful about which files you delete. Think before you delete.
   
4. Once you've deleted the files, download Bilago's Fallout 4 Configuration Tool from the Nexus. Follow his installation instructions.
   
5. Launch Steam, select "Go Offline" mode.
   
6. Launch Bilago's Config Tool .exe file from your Explorer. DO NOT click Play in Steam.

The launcher should execute, click Play in the launcher. Game will load.

 

Again, pretty simple. But here it is spelt out plainly if you are stuck.