Flutter shopping app from codecanyon (6valley Multi-Vendor E-commerce)

I have recently purchased an online shopping package from codecanyon called 6valley Multi-Vendor E-commerce. check this to see the documentation and how it works https://codecanyon.net/item/6valley-multivendor-ecommerce-complete-ecommerce-mobile-app-web-and-admin-panel/31448597
It has two apps 1. user app
2. Vendor app
I need it to change app name, logo, package name, colors and to release them to app stores