You can download the latest FirstClass Client for:

Windows (2000/XP/Vista/7) with Canadian or US spellcheck,

Windows 98

MacOS X with Canadian or US spellcheck, or

Linux Debian, or Generic Intel.

After you have downloaded the Client installer (easiest to find is to your desktop), run the installer to install \ the Client software, then return to your browser and click the following link to configure the client software to connect to the WiER FirstClass Server.