Why is my evaluation expired?

Hi,

I am a student and have downloaded rhino 5.0 with this email for the first time on my computer but it keeps saying evaluation expired. Are you able to fix this problem?
I have also tried to find serial key but that was not working on your website as it kept denying me.
Below is the details of the program:

Version 5 SR13 32-bit
(5.13.60523.20140, 5/23/2016)
Evaluation
SN: 4-1500-1308-100-0003909-30996

Much Appreciated,

Dylan

Apparently that happens once in a while. The only way to solve this is by contacting sales@McNeel.com directly.