Reading the Discourse forum I see that there is a setting called "post edit time limit" that allows the admin to control the length of time a post remains editable.
I have a private thread in which many posts are no longer editable. The first post in that thread contains information that I would like to keep current, but I am prevented from doing so.
So Peter (@peternlewis) can the post edit time limit be reset for me (as a user) or for that specific thread or changed somehow to "unfreeze" my posts?