[big]Steam[/big]

Open the steam console.

Depending on your platform and version type:

win64, 1.0.4
download_depot 512790 512791 7180653263798930777

win64, 1.0.0 download_depot 512790 512791 1214837218755891568

Steam will download the depot then print the path in the console. There won't be any download progress until it's completed.

See also: https://www.reddit.com/r/Steam/comments/611h5e/guide_how_to_download_older_versions_of_a_game_on/