decided to go from no suffix to adding the .html suffix in due to an easier time redirecting currently existing urls. all of my products had been imported without any suffix. when I switched the categories and products to add the .html suffix in and cleared the cache etc it does not show on any of my current products but when I import new products the suffix does show up. Can anyone help me figure out how to get my preexisting products and categories to also have the .html suffix?
I found that if I hid the category from the menu and then unhid it, that the suffix appeared for that category and all the products within that category.