With the new season starting we're going to jump to the newest version of the Sim (2.3.9) & Client (3.1.1) programs. You should still be fine with the older Client file but I'd recommend updating. You can find the files in the Dropbox folder or at the below links:
PC - http://sths.simont.info/DownloadFiles.php?id=STHS-V3-Client-3-1-1.zip
Mac - http://sths.simont.info/DownloadFiles.php?id=STHS-V3-Client-Mono-3-1-1.zip
PC - http://sths.simont.info/DownloadFiles.php?id=STHS-V3-Client-3-1-1.zip
Mac - http://sths.simont.info/DownloadFiles.php?id=STHS-V3-Client-Mono-3-1-1.zip