I was already on X Theme when I decided to upgrade to Pro however, after I validated my license, I went to look for a way to install the theme and there is no option.
HI @AbilitySpecialists You can download a new copy of the Pro theme from this site under your account. Then go to your site, and in the admin panel on the left hand side click on appearance then go to themes and add new, then upload. Add the .zip pro theme file here.
I would also download the child theme for it as well and upload that one too. Follow the same steps above to install this.
Then activate the pro “child” theme. You can then uninstall x theme. and you should be good to go.
Hope this helps.