The latest version of the Max firmware is 88.
Not sure how to check the firmware version on your Max? For details on how to find this using the Sync software on a computer, click here. For details on how to find this using the Virgin Pulse mobile application, click here.
If your firmware version number does not match, do not fret! You'll just need to perform a firmware upgrade for your Max. Check out the "How to perform a Firmware Upgrade?" article for instructions.