Do I have to uninstall expired trial version of Norton before installing Norton 360?

My computer came with a 30-day trial version of Norton Anti-virus (not 360) that expired many monthgs ago. Now I want to install a copy of Norton 360 that i  bought. Do I just follow the normal installation procedures or do I have to uninstall the old version first? Or what do I do? Thanks in advance to anyone who can help.  

My computer came with a 30-day trial version of Norton Anti-virus (not 360) that expired many monthgs ago. Now I want to install a copy of Norton 360 that i  bought. Do I just follow the normal installation procedures or do I have to uninstall the old version first? Or what do I do? Thanks in advance to anyone who can help.