Lindo

Thanks again. In a last attempt before contacting my provider I tried this plug-in: Disable Visual Editor WYSIWYG. And that apparantly does the job! So I let it rest for now.

Thanks Randy for your answer, but unfortunately, after switching-off all active-plug-ins and after switching theme to Twenty Fifteen, I was still unable in switching-off the WYSIWYG editor.

As mentioned, in the db in table wp_<..>_metadata the meta-key for rich-editing (which I presume is controlling this) is correctly set to false. With unfortunately no effect.

Hopefully you won’t advise to re-install WP next …

I just have installed the Exec-PHP to add PHP to my blog, but unfortunately PHP is not executed. As the WYSIWYG editor in WP-admin is refusing in being switched off, though the box in the user setting is unticked, I presume this is the issue.

I checked the MySQL db, and there the status of rich-editing has status “false”

So I presume it really is a WP-admin issue…