>>>Just to be clear, I want to UNsubscribe to the Reliion forum, not add it. I still don't get it.
>>
>>Category filter means filtering the category. So, once added, it will no longer appear.
>
>OK, hopefully I succeeded. I find the page very confusing, you have to be a mind reader to understand it. See attachment, it needs some informative text.

With the upcoming version, you will find that much simpler. I have given you the link in private. Simply click on the Dashboard in Settings\Forums.