How to update TWRP to the latest version?

Download the latest version of TWRP for your device here

Ensure your phone is booted into Android OS

Copy the downloaded file to the root of the data partition

Boot in TWRP (Power on + Volume up)

Select Install

Press the Install Image button on the bottom right

Find and touch the TWRP .img file

Choose Recovery

Swipe to confirm Flash

Go back to the main screen of TWRP

Reboot -> Recovery