Most of the lists that appear in rAware have a very similar format.

Click on the 'Add New xxxx' button to add a new item to the list.

Click on one of the items in the list to edit it.

Click on the trashcan icon to delete an item that is in the list. You will be prompted with an 'Are You Sure?' message when you delete the item, so you don't need to be concerned with clicking it accidentally.