I just went through a similar problem. I am using twentyfourteen. When I created the child theme, some of the customizations were lost. It was too much work to figure out what might have changed by using the child theme, so I went back to editing the parent theme directly. I only had 2 edits to make in header.php and template-tags.php to fix the structured data problems, so I will tackle the child theme solution some other day.
So since I’ve reactivated the parent theme, the files that this plug-in generated will just sit there unused, right? I don’t have to worry that they are sitting in my wp directories?
my website is soccermoviemom.com
