A template is just wireframe which allows you to speed up your work. Although you can set a template as your under construction page without any changes, it is advisable to personalize it at least a bit. So, how do you customize a template?
The button will open the Drag&Drop Builder which will allow you to customize the selected template in detail.
Customers who purchased and have a valid PRO license - contact our support via the contact for built into the plugin or use the general contact form. If you're using the later method please include your license key in the message or contact us via the email address used when purchasing. This speeds things along.
Using the free version? We have you covered too. Head over to the forums. First look at older threads and if you don't find anything useful open a new thread. Support is community-powered so it can take some time to get an answer. If you need premium support this second - upgrade to PRO.