Looks like the game updated at the start of the month which has expired all the previously posted keys so they are marked as 'past'. I'm not sure if you can still download the now out of date version, or if you're stuck until a new key is posted.
FWIW, the older version still runs with the expired key if you did already have it downloaded.
FWIW, the older version still runs with the expired key if you did already have it downloaded.