Using Zen 1.5

I'm having a linking problem for the product(5)

It was working, then i changed the "Product Types" Handler page to a different name, but I don't know what the original handler page was, SO now when on the category/product layout page on the front end lke this:
http://timberlinemeat.com/index.php?...e=products_new

you click the product link, it goes to a Custom 404 Page mnot Found error page..

I am unsure as to what the path should be for all the Beef products to link up properly..

http://timberlinemeat.com/index.php?...roducts_id=123

How can I find the correct name of the correct Handler page for the Beef Products so I can change it on the back end?

Thanks for any help this is really frustrating, as I am new to zen..

Best

Kale