Penci Design replied
Hi,
In package have code home page, please find home page you want with format .txt. Then open this file and edit page error, go to "Text" tab then paste code in here ( http://prntscr.com/m2egol )
please go to https://themeforest.net, login to your themeforest account and go to download page > re-download "All files and documentation" > after downloaded this package, extract it and open the folder. You will see list of code home page.
Or you can use Revisions of Wordpress. Revisions is a post type and a feature in WordPress. It enables WordPress to automatically save revisions of your posts, pages, or custom post types after every 60 second while a user is working on them.
Please check this guide to know what is revisions
Please send me your screenshot this feature on old theme.
Best Regards,
PenciDesign