Decode Website Script

I currently use a website that uses a license. I own the license. What I want is to be able to run the script on my website without the need of the license. I want more control of my website without having to worry about the people that sold me the script going out of business since the license is stored on their website. I have no idea on how to do this, you will need to have a look to see if you can do it. Once you finish the job, you will have to tell me what you did and what file(s) you modified if any. The budget for this project is $50.00 Half payment to GAF escrow once you been selected. Full payment once project is finished and fully tested. Thanks.