License Rhino validation

Hello,

I am trying to install Rhino. I have an educational license in the office.

I install it using serial number from rhino 5.

But then when it is installed it requires email and serial number from rhino 4.
I have serial number from rhino 4 but which e-mail should I use.

My personal one does not activate the license.

Thanks

Solved it. It was connected with school email, not my personal one.