1. First find the latest update file for your device in ReplicantImages, it will look like that:
replicant-6.0-<yourdevice>.zip
1. Press the power button
2. Select Reboot
3. Select Recovery
4. Press OK
1. Select Apply update
2. Select Choose from emulated
3. Select the update file, which looks like that: replicant-6.0-<yourdevice>.zip
Note: With Android 4.2 and later, it may be located in the 0 directory
4. Confirm the installation
5. Press the back key (if necessary) to get back to the general menu
6. Select Reboot system now to reboot the device
7. Your device should now be updated!