How can i register my license

Hi there,
I have bought sydney. And i use free version of it. And now i want to upgrade my theme to pro how can i do it?

Hi,

To upgrade you have to buy the pro version from here: https://athemes.com/theme/sydney-pro/ if you already purchased it, please download it from your Account and go to wp-admin > Appearance > Themes > Add New - Install & Activate it.

Kind Regards,
Csaba