To assign a contact to any given program, click Assign Programs. Select a program from the left and use the arrow key to assign the program to that contact. A list of assigned programs will appear on the right. To unassign a program, click on Assign to exit the Assign Programs screen and then deselect the program you wish to unassign in the main programs tab by unchecking the checkbox next to that program.
Programs that are unassigned in the main programs tab will appear as unchecked in the white box where the programs are listed as long as you don't exit that screen. Once another tab or option is selected, the unassigned programs will be removed completely from the list.