@albhost attached file is only interface, its communicating remote server and fetch some binaries.
as your question;
Its not reverse engineering, do you know cpanel shared license working structure? I assume you don't know.
If we can get another files with any valid license key, these files too garbage because all structure is binded to him API server, all of license request/response working with remote API server so have IP Binded license mechanism.
Another option if we have valid license and maked proxy interface for using these files with another server so its won't work because he is have request IP address and license request IP address matching with license key so its too garbage.
The original creator of the gblicense, my friend, even though he is my friend, he didn't help me
I'd really like to help, but you're wasting your time.