The updater did not work. It also failed when I tried to run the 3.6.3 update, so I also had to run that one manually as well.
Here is where it froze this time…notice the “Downgrade Not Supported” error:
@keeenone There is a problem with the content of the phplist download file see phpList 3.6.4 is available for download - #2 by duncanc
So I’ve manually updated, and it seems to be working ok. Can I assume that I don’t need to do anything now, and that next time the auto updater will work?