@fclaussen
Hello all and thanks for help. Unfortunately, I didn’t succed to make this plugin work on my WP version 4.6.11. I deactivated all plugins and theme and I have the same behaviour. I filled all the fileds, in all tabs, hit save and not saving. I also see now that in plugin page I have “Not compatible with your WP version”. It’s not an easy job to uprgade my WP verion because I have a lot of dependency with plugins and so on.
I look forward to use this solutions, if ever Fernando will have time for this. I have a copy of site on a dev. Thank you!