Hello Cesar, glad you are liking the theme.
Could you please only ask one question per topic. I have moved your other question to it’s own topic.
If you decide to buy the Pro version, the theme is yours to keep and use forever.
The license is for 1 year and allows you to receive updates for the theme.
After 1 year, if you choose not to renew the license, the theme is still yours to keep and use forever but you will only be able to receive ongoing updates if you renew the license.