Hello,
The changelog of theme you may find here https://www.8theme.com/demo/xstore/update-history/?preset=blog_fixes We’ve sent to your registration email 4.7 theme version, so you could compare files and transfer changes to child theme https://codex.wordpress.org/Child_Themes + http://xstore.helpscoutdocs.com/article/32-child-theme to prevent losing changes after theme update.
Regards
