Ragnar
A Master From Germany
From now on, members --- and others including the banned and unregistered, cos why not ? --- can download a thread, or even their own entire content. or others' own entire content, by accessing the three little dots at the top of the thread etc. on the extreme right. 
You may have to experiment to find how to download all a person's content... I can't see it yet; but there's no point in delaying this wondrous news.
I was mainly looking for a way to download entire conversations, and this is not it; apparently, in the previous iteration of XenForo, before us, there was an add-on to Export Conversations, but it hasn't been made for XF2.
There is a paid add-on for Searching Conversations, but again not the same thing.

You may have to experiment to find how to download all a person's content... I can't see it yet; but there's no point in delaying this wondrous news.
I was mainly looking for a way to download entire conversations, and this is not it; apparently, in the previous iteration of XenForo, before us, there was an add-on to Export Conversations, but it hasn't been made for XF2.
There is a paid add-on for Searching Conversations, but again not the same thing.