Hello,
Your parent theme and XStore Core plugin are not the latest versions. That’s why you see the message about out of date files.
You don’t need to update child theme but please update XStore parent theme and Core plugin to latest versions – http://prntscr.com/qrmeeb https://xstore.helpscoutdocs.com/article/63-theme-update
This article will help you to update plugins – https://xstore.helpscoutdocs.com/article/37-plugins-update
Regards