unregister elicenser

Thank you for the response. I should have put in more details with my original post. My son originally bought a Yamaha Audiogram6 that came with Cubase LE AI6. He registered the program under his own account here on Steinberg and everything worked fine until this past week. He saw where he could upgrade the software to Cubase Elements 7 which gave him some additional features that he was looking for. We purchased and downloaded the new version of Cubase and installed it on the original PC. Everything seemed to work fine, except that after we installed it, some other software that he uses (Reason’s Essentials) quit working properly. Long story short, I’ve been wanting to redo the PC that he had the software on, but I didn’t want to format it and do it right now. I have another computer that I thought I would go ahead and install all of the software that he needed on it, including Cubase. I have Cubase LE AI6 installed, but it’s installed in the demo/trial mode because I’m unable to get the original code that he had for the old computer to work on this new computer. I can’t install Cubase Elements 7 installed because Cubase 6 isn’t enabled correctly. I tried going through the “re-activation” process, but that is where I get stuck. The eLicenser is registered under a different account than the Cubase LE AI6. It’s kind of a mess and not sure how to fix it so that I can use either the old software or the new, but especially the new version.