red buton next to serial no in nero

I updated my nero 6.3.1.25 up to 6.6.0.16 & when i look at my serial no it has a red button with a white line in the center is this ok or should it be green.

 

its only green when you are inputing another serial number otherwise it should be red with a line through it.

 

Many thanks I was worried I might have done something wrong & it would not have been the first time.