The latest versions are:
Q Software (used for viewing and exporting sensor data files): 2.01.56
Q Live Software (used for viewing live data stream from Bluetooth-enabled sensors): 1.02.314
Q Sensor firmware for V1 (non-Bluetooth) sensors: 1.51
Q Sensor firmware for V2 (Bluetooth) sensors: 1.81
The software and firmware can be downloaded from the Downloads section at http://qsensor-support.affectiva.com.