Hi Jan
Thanks for reaching out.
Sure 🙂 You use the Bottom Bar menu location (add a menu from Appearance > Menus to the bottom bar social location) OR you can insert text and links in the Copyright field.
Footer
Appearance > Customize > Theme Settings > Footer. You can add a link using HTML:
https://www.w3schools.com/html/tryit.asp?filename=tryhtml_links
You could purchase a new single site license for a price you’d like to pay or you could upgrade to an unlimited multi-site license which costs $50. If you’d like to use this option, you’re welcome to deduct the amount you paid for your previous license. Upgrading is possible from the theme page.
Let me know how the footer text goes 🙂