The message: “Your trial has now expired"

Hi.
We have purchased a license for a DataTables Editor, but when we run the Editor from within a *.war file we receive an alert. In the war-file the Editor is embedded as the source of an iframe, located at an outer Apache2 web server. The browser’s cache is cleaned.
The Editor still does its job, but we want to remove the alert. The message: “Thank you for trying DataTables Editor. Your trial has now expired. To purchase a license for Editor, please see https://editor.datatables.net/purchase”.
Thank you for your former replies, hope you to answer.
Best regards