how to delete folders?

Hi,

the website was created as http://www.website.com/index

now, i copied all the files into the main folder in the hosting account. The website now is accesible as http://www.website.com without the index prefix. But when i navigate through the pages, it still refers to the files in the index folder, eg. http://www.website.com/index/contact. I want to use the files in the main folder, eg. website.com/contact. I haven’t seen an option in the admin panel.

Could you please help me?