Serial entered but "Unregistered version is fully operational..." message persists

Purchased license, received serial number, entered domain name associated with SN in "Website Address (for registration)" as well as copy and pasting SN in the text box.

Saved. Acknowledged that plug in was saved.

Re started application.

the Unregistered version is fully operational. message persists.

How to get rid of that message?

Make a print screen of the plugin configure page and send to email support@foxnetsoft.com