Message eM Client doesn't have a valid license - been using for couple of years

Closed down eM Client this morning and re-opened a little later and I get the following

I went to lost activation to get code resent to me but I still haven’t received the email, (checked using webmail) Is there an issue with licensing servers? How do I retrieve my free license?

Regards,

Martin

I can confirm that after 10 minutes, there was no notification from http://www.emclient.com/lost-activation-key

Thanks Gary, I got the email eventually and  successfully activated eM Client.