once you open adaption you need to enter channel 01 and press read.
It should then show you the number of remotes currently programmed
You then nudge the new value up to 1 or however many keys you have, press test and ensure the test value says 1, then press save.
Then within 15 seconds you need to press the unlock button on the remote.
It also says that on some cars you'll need to clear the existing programming, by storing the value 0 first.