I ran into a totally different problem trying to upgrade another site to version 126.96.36.199. I deleted the index.php file and the standard themes and zp-core directories and FTPed up new copies. When I try to run setup I get an error on the database connection. I checked the zp-data/zp-config.php file and found that it had no database connection info in it. I entered the database connection in the space provided in the setup form but it fails to connect. I tried creating a new user in phpmyadmin and assigning that user all rights on the zp database and can connect in phpmyadmin with those credentials.
I cannot connect using these credentials by either entering the info into the zp-config.php file or by entering the info into the setup form.
Do I need to delete the zp-config.php file so it can be created by setup or is there somewhere else that I need to enter the connection info?