NIS 2009 License

Hi,

my NIS 2009 License is valid until the end of august.

What I want to know is, if I will make a renewal for 2 years now, will I loose the 100 days of my old license or will they be added to the new license (so I would have 830 days)?

Please excuse my bad english, I' m from Germany and I hope you understand what I want to know.

Best regards

Ralf