So I booted up blockland and for some reason it asked me to enter my key, sure no problem I've got that written down
So I entered the key (and I'm pretty sure I did it correctly, I may just have stuff handwriting) and it says "Full version unlocked!"
...for about one tenth of a second, after which it says "Invalid key"

And then there's this:

This is not just a case of I'm entering the key wrong, because a random piss-about keymash will just get "Invalid Key" rather than a split second of "Full version unlocked!"
So I'm quite confused right now as to whether my key was revoked or something, and would like help regarding the matter.