The products that have been added can be updated at any point in time. This can be done as: Products -> Manage products

                                                                                               

On this page, a list of all the products that have been added would be visible. Any product can be selected to be edited. Click on green 'pencil' icon to update the products.



On this page, various product details would be visible that can be edited. Please note that everything can be edited on this page except product variations( addition & deletion) and product hashtag.