This is the last ExpressVPN Key that can be found on cracking forums (as far as I know, of course) and it still works. There were about 22 of them, but they were all disabled in a short time. With this code I am giving you now you can activate your app but rarely connect to the network because a large number of people are trying the same. So here's a try.
Update: The Key doesn't work anymore. Please do not reply to this post again. Thank you.