If you have obtained any of my premium add-ons from another site, you DO NOT have a valid license for those add-ons and no support will be given to you. The only place that can sell licenses for my premium add-ons is this site.
Thread is not closed. They can edit the first post but cannot edit the thread title and prefix status of the first post.
The usergroup level edit time limit is 45 days. The first post is older than that. But shouldn't that be overridden by the node level settings above?
If I set the editing/delete posting from inherit to unlimited (or more than the age of that first) at the node level they can edit the thread title.
If you're talking about the Prefix Actions add-on, there is a bug in that which is preventing the prefix from being changed after the user's edit time limit has expired. I'll issue a fix for that add-on some time next week.