Update home.php. New version and mini-list of changes.
Update features.php if any new features
Update downloads.php. Update version number. Adjust file sizes if necessary.
Update latest_sofastatistics_version.txt and (if required) latest_major_sofastatistics_version.txt. NEVER update the sofastats versions as it will break versions 1.1.2 and 1.1.3 (the code for showing the update now link is broken in those versions).