Critical Error Issue

Good evening, I have a problem. I’ve launched a new website and installed a plugin that was previously registered on my old website. Since my old website has many issues, I wanted to try creating another one. Is there a way to remove the license from my old website and transfer it to the new one? Just to try it out; if it doesn’t work out, I’ll need to remove it from the new website and transfer it back to the old one. How can I do this?