Most binary files are pkziped, changes.txt with description of changes is included.
It should be possible to compile changed Astrolog on Unix systems too. Because Swiss Ephemeris are more precise and quick than older Placalc ephemeris, I moved to 5.41 and don't will change versions with Placalc anymore. So Astrolog 5.40a doesn't exist. If you experience problems with download, feel free to contact me. Back to Valja's astrology page.