Beta Testing

I had decided that I wanted to be a beta tester for Kodi about a month ago, mainly so I could see how the new one was going to look. However, I am now regretting my decision. My question is: How do I stop being a beta tester? I thought I would be able to figure this out pretty easy, but, I guess I’m not as good at finding things online as I thought I was. So please, any help would be greatly appreciated. Thank you.