What's the 2004 'old' version?
The 2004 version would originally have a PHP frontend, but the archived version here has the HTML frontend. The backend is Javascript. The layout is older, and is not as well-designed. The images are not as well-detailed, either. The PHP version would have required you to have setup a webserver (such as Apache or nginx), but most average PC users are not too knowledgeable in regards to setting one up. But since the archived version here is HTML, this one can also be run locally on your computer.
Download:
bsgen_old.zip - 2004 edition