Activation required after years. But refuses to activate.

EMclient stopped syncing mails, complaining it cannot be activated due to me violating your licensing policy. How? How do I fix this?

Hello Dirk,
your license has been blocked due to possibly violating our FREE license policy - just as the message says.
If you wish to purchase PRO license or believe this to be a mistake, contact our Sales department at sales@emclient.com

Best regards,
Olivia