Hello sir,
I am a computer engineer. Right now I am working with software development and debugging. Applying information security for the good cause is always my interest. I have also helped others to understand the concepts of information security and all how much I studied in college. By reading this stuff, all the files were encrypted I did not feel good about it. Because it may contain sensitive and important data also. If you can deliver that file and the decryption software as you mentioned, I can find that key for you that''s what I think because I will feel nice if your data is getting back. If you trust on this and if there is no problem sharing few files and most importantly, if you find me suitable for this task, please message me. I am going to help for it for sure,
Thank you. :)