This is the error I get:

Zenphoto has detected a change in your installation.

The script functions-image.php has changed.
Your installation has moved from /home/phishy/rpmlandscapeandpavers/photos to /home1/phishy/rpmlandscapeandpavers/photos.
Your database software has changed from MySql 5.5.23 to MySql 5.5.30.
Please reinstall the following setup files from the 1.4.3.1 [10590] release:

zp-core/setup.php
zp-core/setup/setup-functions.php
zp-core/setup/setup-option-defaults.php
zp-core/setup/setup-primitive.php
zp-core/setup/setup-sqlform.php
zp-core/setup/setup.css
zp-core/setup/setup_permissions_changer.php
zp-core/setup/setup_set-mod_rewrite.php
zp-core/setup/setup_themeOptions.php
The change detected is critical. You must run setup for your site to function.

First problem: I do not have a copy of 1.4.3.1.

Second problem: I have no idea what to do.

I searched the forum and apparently this has never happened to anyone else before.

Any help would be awesome. Thanks in advance.

You have to re-upload the files that are missing. You find older versions here: http://www.zenphoto.org/news/older-versions-archive
Then run setup as requested. /zp-core/setup.php should be that on such older releases.
This is a security measure to alert changes to the install or the server that very well could be unwanted hacks. If you were on the current release you would not have to upload anything.