• From the "My Lists and Groups" menu, select the green action arrow of the list you would like to rename.  
• Select List Maintenance
• Simply change the name of the list and Save.

• From the Lists/Groups menu, using the green action arrow, select to Delete List
• This will give you a warning dialogue box and an opportunity to confirm that you want to delete the list permanently. 

• From any saved list, use the command in the green action arrow

From the same menu, the List Maintenance command is available for setting email alerts (mostly for slip notifications but can be for self created lists as well):