We do not send you a purchase code in your email, and you do not need a code to switch to another clockface.
Instead, you first install the new clockface or app you want and then wait for it to ask you to pay again.
As soon as that happens you can unlock it again for free by going to https://kzl.io/unlock using the code it shows you on the watch at that moment.
If for some reason it does not ask you to pay again, that isn't a problem and you can just use the clockface as is, the functionality is exactly the same before and after unlocking.
Updated on: December 23, 2019