Upgrading The Sky version 5

Dear Sirs,

I purchased The Sky version 5.00.010 with Serial Number {redacted}.

I would like to know if I can upgrade it to The Sky X Pro for Windows ($225.00) or if I have to purchase it ($329.00), download only.

Thank you.

Kind regards.

Giampaolo Canazza

gp.canazza@gmail.com