by Quade » Tue Sep 15, 2020 5:54 pm
There's no way to automatically do it. The reason is that Newsbin never intended you to have gaps in the group. By restricting how far back you go each time you download headers, you're introduce gaps in the stored headers.
If you don't care about that, you can purge the group "Post Storage/Delete Stored Posts" before update and keep your "Download Age" set to a couple days. Or you can right click the group "Post Storage/Use Download Age" which does the same thing without purging the older headers.