Hello @priiincesss,
Please watch this tutorial how to update the theme:
(it’s for Legenda theme but the process is the same).
Don’t forget to create back up of your files and database before starting update process!
You should update plugins the same way (overwrite plugins folders in the directory wp-content/plugins). You can download the latest versions here: https://www.8theme.com/download-plugins/ .
Regards,
Eva Kemp.