You are correct. They are an international hacking crew. They usually only "crack" software for release to the general public. I am surprised and disappointed to hear that they are doing this.
Mister, the FBI is slow in responding because they know that logs on kept on servers, etc. These people can be traced. Just be patient.
As to what you have to do to not have them release the copyrighted info.....I don't know about that. I would say that you are out of luck.
However, I hope you have learned a good lesson about computer security.
Get encryption software.
Get a firewall, both hardware and software and a hotshot tech who knows how to configure both.
Have levels of security on those computers that have internet access.
Have a "server" so that only the server has access to the internet and other computers in the system have to go through the server to get to the internet.
Restrict internet access to only those computers which require it.
Restrict internet access to only those employees who require it. ( Marginal employees/lower echelon employees will usually use real-time chat programs, go to chat sites, do personal email, shop, etc. They alone can make your system more vulnerable. ) Run a tighter ship.
Good luck!
As I read it, they paid for the privledge of download with a stolen credit card. They did not hack his computer.