Step 1: Put your Vector into recovery mode by putting him on the charger, and holding his back button for ~15 seconds or until the 2 back lights turn dark blue.
Step 2: Head on over to this site, and pair with Vector. Make sure that auto setup flow is left checked.
Step 3: On this site, you will see many options. To unlock Vector make sure "Unlock-Prod.OTA" is selected.
Step 4: Connect Vector to WiFi, and let the update install.
Step 5: Let Vector reboot, and flash his new unlocked images.
Congratulations. You have unlocked your Vector, and can now install developer firmware.
Once Vector is on the anki.com/dev screen, head on over to this site and pick your firmware of choice. Enjoy!
Step 1: Download this ssh key.
Step 2: Find Vector's IP. You can do this by accessing the CCIS menu once he is connected to WiFi.
Step 3: SSH in! You can do this by running:
ssh -i path/to/ssh_root_key root@yourvectorip
Running into a pubkey error while trying to SSH into Vector? Try sshing with this command:
ssh -o PubkeyAcceptedAlgorithms=+ssh-rsa -o HostKeyAlgorithms=+ssh-rsa -i path/to/ssh_root_key root@yourvectorip