Starting from a working 1.3.9h install, which worked fine, I modified all my .php files and uploaded them except for the admin and the zc_install folders.

I got an error message regarding having to upgrade the db (I'm afraid I'm not able to be precise about which error msg due to it being late and me being groggy), so I started by copying the zc_folder to the server, and then started the upgrade process from there.

It found that I had no 'admin' folder so I couldn't upgrade until I copied the admin to the server.

Given that I had, for security reasons as required with my original fresh install, renamed the admin folder, why did I have to put a new copy of the thing on the server? Was I supposed to temporarily rename the admin-folder-with-the-changed-name back to admin?