How can I use a custom s3 upload location on an existing user?

SSH in as ec2-user and run sudo addsftpuser <existing username>, and during the process specify a custom location. This command can be re-run on existing users to update their settings.

I have updated my existing server to version 1.003, but I don't see any of the new features!

Be sure to SSH in as ec2-user rerun sudo sftpgatewaysetup after updating. (( sudo addsftpuser <existing username> must also be re-run for each existing user ))