length of licence

This may be a bit morbid, but I would like to know…
How long does a licence last on the Parabolic SAR ea Pro actually last? Is it the same length for all your ea’s ? Does the free version also expire?
Also, what would happen if my licence expires, but when I go to renew it, I find that you have expired as well? Is there an unlimited expiry version?

Would that be the end of the ea??

Thanks