I just updated Keydiy KD-X2 to version 4.6.2 and the REMOTE UNLOCK option is now available.
Unlock key means in this case unlocking used keys so they can be reused , thus cutting costs on new keys by unlocking and using 2nd hand keys.
PS: Its work, but KD-X2 dont have many remote for now.
Therefore, if you want to unlock used remotes and save cost, you can order one Keydiy KD-X2.
You can order from here:
UOBDII All rights reserved Keydiy KD-X2 4.6.2 update: unlock used remotes perfectly