I haven't figured out why you're having the unarchive problem using
Stuffit exander. But here's a workaround to unzip the file through the
command line instead:

try this:
CTRL-click on the download and choose "Download Linked File" (Safari)
or "Save Link As" (firefox).

save the zip file to your desktop.
next:
open up terminal in the utility directory.
from terminal type:
cd desktop [ENTER]
unzip filename.zip -d directory name

for example:
unzip 1133146193.php.zip -d pog

should unzip all the files in the zip file like this:

Archive: 1133146193.php.zip
inflating: pog/class.database.php
inflating: pog/configuration.php

As for your 2nd issue (the gibberish characters), this is happening
because you're outputing stuff from the database that wasn't inserted
through POG. POG automatically encodes the data using base64 encode
upon Save() and decodes it upon Get(). Since the data in the database
wasn't inserted using POG, POG is trying to decode stuff which isn't
encoded, which causes the gibberish characters.
A workaround is to insert the data using POG in the first place, or to
comment out the Escape() and Unescape functions in class.database.php
like this:

function Escape($text)
        {
                /*if (!is_numeric($text))
                {
                        return base64_encode($text);
                }*/
                return $text;
        }

function Unescape($text)
        {
                /* if (!is_numeric($text))
                {
                        return base64_decode($text);
                }*/
                return $text;
        }

Hope this helps. Let us know if it works.

Joel