At Settings → SatisPress, you'll find the settings page:
When requiring a package from SatisPress, the default would be a package name like satispress/genesis.
The "Vendor" field allows this to be changed; a value of mypremiumcode would mean the require package name would be like mypremiumcode/genesis.
See the document on Security for more information.
See the document on Whitelisting Plugins and Themes for more information.