When I click to configure the program I get this message:
The requested URL /gedview/install.php was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
What version are you trying to configure?
You should be using the "SVN" version, which is also called 4.3.0. Download and upgrade/configuration instructions are in a help topic whose title begins with "Repost: Download …". Be sure to follow the instructions.
Since you're just starting out, you can erase the existing installation completely.
You might also want to have a look at Webtrees. Webtrees was developed from PhpGedView and is a better choice for new users. It's being actively supported, developed and improved. PhpGedView has been more-or-less stagnant for over 2 years now.
I had exactly the same problem yesterday. I eventually decided to download phpgedview and extract install.php. I then uploaded it to the website and it worked (so far). Low risk because I can start from scratch with this new venture.