Help for a newbie!

I recently downloaded a PHP program that I'd like to try. I'm just learning PHP. The program uses codeigniter. I followed the instructions and I think I have codeigniter working because I get a message back. The rest of the code seems to be ok. But, all that I get is the codeigniter welcome message. The code is installed in the "fsbo" folder under my root. The application is called "upble" . The website for the product doesn't seem to work. My question is how do I get past the codeigniter screen to get the application to work? Sorry if this is vague or confusing, but I'm just learning.
Thank you for any help that anyone can offer.