Thanks for the reply, but it's neither of those options. When I click on "Show new replies to your posts" I get a long list of updates that may be quite old or no longer of any interest to me. I was hoping I could click a button or two to stop them being on my active list. I guess the answer is to remove my posts from the thread, but that could cause problems if people have responded to them.
It's not exactly the end of the world, just a little annoying.