Is Reinstall after Reinstallation Required?

I recently had to recover my default settings on my netbook after a hard drive failure.  The recovery program backed up "my documents" and some programs that I had installed, including my Norton 360.

 

However, I can't figure out how to make N360 the default AV program again.  Do I need to do the uninstall - reinstall thing? or is there another process whereby I can point the OS towards the existing N360 files?

 

TIA for all replies.