How Do I Upgrade From NIS 2010-2011?

Hi

 

Hope you can help with what are no doubt some basic questions.

 

I have NIS 2010 running on three of my machines with no problems.

 

I've just went out and bought the NIS 2011 version from Amazon and they have supplied me with a package with a disc, etc.

 

What I'd like to know is can I just put this discc in the machine and it will update itself on top of the NIS 2010 that is currently there? Or do I need to uninstall the NIS 2010 before I proceed?

 

i ahve to confess that I am a computer idiot so please be VERY gentle with me ;-)

 

I'd be extremely grateful if anyone could put me straight on this one.

 

Also, if I update now it is about 21 days before my 2010 sub runs out, should I wait until the day the other one runs out rather than risk losing 3 weeks of subscription or is that allowed for when the new version is loaded on to the machine.

 

Thanks