The option to edit the footer content is only available in the pro version of the theme so if you wish to add or edit the content then you need to upgrade to the pro version. If you upgrade to the pro version then not only this but you will have access to other amazing features.
To know more about them please refer to below given link:
The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.