Today's a bugfix update, nothing too special.

- Fixed a crash associated with attempting to Quicksave on the main menu
- Fixed a crash associated with attempting to load an empty Quicksave
- Fixed the Linux build failing to launch - the November Steam update broke it, and we only just now realized
- Game version string now indicates if you are running the Windows or Linux build (so we can better diagnose stuff like builds failing to launch in the future)

Take care of yourselves, Custodians!