If you wish to downgrade your Jupiter theme to an older version, there is a built-in feature just for that.
Note: The downgrade feature is available only from Jupiter version 6. To update your theme, check out this article.
Downgrading Jupiter Theme
1From the WordPress left menu, go to Jupiter > Control Panel > Updates.
2Find the version number to which you wish to downgrade the theme and click on the Downgrade button.
3A new notification pop-up window will apear, click on the Agree button.
Beware! By clicking on the agree button, any customisation you have made to theme files will be lost.
4Wait for the downgrade process to finish.