First of all, rest assured that we are here to help and will do our best to follow up with the problem that you are experiencing.
I checked your licenses page and found out that you recently purchased an X license and then converted the license to Pro. I checked the URL of the website that you associated with the license and it is still using the X theme.
To be able to convert it to Pro, please kindly follow the instruction below:
After the conversion is complete, you need to go to WordPress Dashboard > Plugins and make sure that you deactivate and delete the Cornerstone plugin as the Pro theme has the builder already integrated.
After that you can go to WordPress Dashboard > Pro > Header/Footer to work with the unique header and footer builders of the Pro theme. To get to know with the Header and Footer builders kindly read the Pro section of our documentation here.
If you have another problem I will appreciate that you give us more details and we will be more than glad to follow up and be of help.
kindly get back to us with the result of the steps above and URL/User/Pass of your WordPress dashboard using the Secure Note functionality of the post to follow up the case if you still have problems.