If you did a proper Archive and Install it will be in the Previous System.
How to Archive & Install:
and this also:
This document explains how to correctly reinstall a prior version of Mac OS X in the event that other troubleshooting does not resolve an issue:
Thanks for your post. I have already gone through the Archive and Install process using the HT1710 document. At that time, I checked the Save Users and Networks option.
The HT2196 article doesn't help, because I find no files in the User Folder.
This link takes me to the Apple Support home page for some reason...
Any other thoughts on how to find the Users files?