Hello,
When you switch to the List Manager you should see a Navigator panel on the left, under highlighted entries in the navigator there are choices of List Of Payees, Financial Institutions, Transaction Categories, etc.
When you click on any of these entries then a corresponding list will load to the right.
Here is the appropriate page from the manual,
http://wiki.mthbuilt.com/Payees_and_CategoriesThanks,