Please help, I am new to Zen cart and the initial layout of this site was done by someone else and now I am not sure if it is change they made or if I am just clueless .

I want to have an introduction of our company and a welcome message on the home page located on http://www.tierlantyn.co.za/shop What file do I need to edit? I thought it was the define_main_page.php in home/tierlant/public_html/shop/includes/languages/english/html_includes/via the define pages editor in tools and made my changes accordingly, but it does not display the content I typed in. Please could someone help me understand what file I should be editing?

Thank you so very much for everyone’s help so far, if it was not for everyone’s inputs I would never have come so far. Much appreciated!