USB software downloads are found here: http://temperaturealert.com/Temperature-Support/USB-Temperature-Monitor-Support/USB-Downloads-Documentation.aspx
While the installer comes with drivers, the latest compatible drivers can be found here: http://www.ftdichip.com/Drivers/D2XX.htm
Windows XP and Windows Server 2003: Version 4.08 or earlier. 4.08 is capable of using Sensor Cloud.
Windows Vista to Windows 10 and Windows Server 2008- 2012: 4.5 is recommended. Older versions can be used if needed.
Linux: There is no software version. You can download a sample script that takes readings and should get you started on any custom coding.