On the Blue’s Device page, look for the “Update Firmware” button near the top – click it twice.
The go to the Logs page – it’ll open in the live logs view – click on past logs, and you should see an acknowledgement that the firmware update was requested and started. Click back to the live logs view and you can monitor its progress – it may take a couple/few minutes to complete.
2.08 is the current latest f/w available.