Thank you for quoting the link I listed back at me. It does not address the issue, nor solve the problem, if you read my question. To repeat:
Topic has been closed and does not provide an answer.
I am using your plug-in and posts are build using BeTheme (Muffin). Is there any update as to how the license field can be added in the chart options please?
For clarity, there is no way to add structured data to the front end, that I know of in this situation. Previous posted also mentioned (after topic was closed) that it did not work. Is there a different way of adding the GPL information. please?