How to turn off Automatic Renewal for NIS 2008 - help?

I'm not the best technically minded person out there so any help would be much appreciated!

 

My subscription for NIS 2008 expires in just over a month and I'm looking at getting the latest Norton 360 but i'm sure the automatic renewal for NIS 2008 is turned on. Anybody know how to turn it off so I don't continually get charged for it when it expires and I buy Norton 360?

 

Thanks much!