If you are using the Launcher version of unreal, you can go to the library tab in the unreal engine section, add a new version, select the version you need from the drop-down, and download it.
Where can I get unreal engine 4.23.0? I need to use it with Vehicle Dynamics Blockset Interface for Unreal Engine 4 Projects which seems to only work with 4.23.0 and not the other versions. Is there a workaround for this, could I possibly use newer versions of Unreal Engine with the interface and how can I do this?