Provide FTP access, please. If you do not know how to create FTP contact with your hosting provider, they will help you.
Also, do a full backup just in case.
How did you do the theme updating? Why do you have 3 parent themes? Did you read our dosc – https://xstore.helpscoutdocs.com/article/63-theme-update
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.