Version 1.8.4 to version 2 upgrade - can't find documentation

Hi, I am about to update a very old Perch 1.8.4 site with 6.5 years of blog and event entries to version 2. I have found the page with the a link to the instructions: https://grabaperch.com/update/v2-0. However, the link itself in para 3 "upgrade instructions" is broken.

Please can you direct me to the latest upgrade instructions.

Cheers - Mark