DDLCWiki:Accessing older versions
Accessing older version of Doki Doki Literature Club! is simple, but the process is different for each of the different distributions of the game.
To download older versions of the game from itch.io, you will need the desktop app. Then, navigate to DDLC's page. Right-clicking the sidebar, there's an option labeled "Switch to another version..." labeled under the "Advanced..." section.
The game files can be accessed by clicking "Show local files" in the sidebar.
There is currently only one version of the game on Steam.