Entering new product key for nis 2011

Hi,

 

My subscription fo NIS 2010 was about to expire so after checking prices I bought NIS 2011. Shortly afterwards NIS 2010 automatically downloaded NIS 2011 and I installed. This leaving the period until the subscription expires the same as it was.

 

I have been searching for a solution on what is the best way to install the new NIS 2011 that I have bought. I can think of two options:

 

a) Change the product key for the NIS 2011 already installed and activate this.

 

b) Uninstall the NIS 2011 already installed and then install the NIS 2011 I have just purchased.

 

Does anyone know if (a) is possible or if the only option is (b) ?

 

Thanks for any help.

 

 

Goggs75