Upgrade not available in download file iRedMail-0.9.0

==== Required information ====
- iRedMail version: iRedMail-0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: CentOS 6
- Related log if you're reporting an issue: Yes
====

I am upgrading from iRedMail-0.8.7 to iRedMail-0.9.0

I followed the instructions on http://www.iredmail.org/docs/migrate.or … admin.html

NOTE: There should be a link here to the download page, I had to search for the download.

I downloaded iRedMail-0.9.0.tar.bz2, in /root/ untapped it "tar xvc iRedMail-0.9.0.tar.bz2", went to the /root/iRedMail-0.9.0/tools directory and there was no script labeled or named anything like 'upgrade'