Updating a Ktag clone from 2.25 to 2.70 is not a casual weekend project. It requires electronics knowledge, patience, and acceptance that you might destroy the device. If you are a professional tuner, buy the original. If you are learning, stay on 2.25—it already supports 90% of pre-2018 ECUs.
The software should automatically begin downloading and updating "families" and "protocols," which typically takes 2 to 5 minutes. : Update Ktag Clone From 2.25 To 2.70
If you want, I can: