2.) Program options
4.) Item lists tab
Once in the item lists tab, select the Data List you'd like to edit from the drop down.
Once the Data list is selected, type into the bar next to Data Lists (5) and click the green + when finished (6). The item will now be present in the data list.
Rename / Edit
You can edit / rename an item simply by double clicking on the item
Hopefully this guide helps!