Corporator is a WordPress theme, so make sure you have already installed WordPress. If you haven’t yet, go to wordpress.org and you'll be able to download it free and follow WordPress installation instructions.
Download Corporator from your NsThemes account, in "Downloads" page and save it in your desktop.
You can install Corporator in two different ways:
Via WordPress - Login in your WordPress site, go to Apparence, choose Add New, click on Upload Theme, choose corporator.zip file, click on Open, click on Install Now and wait for installation message. When installation is finished, click on Activate button.
Via FTP (skip this step if you have already successfully installed your theme via WordPress)
Corporator required only a plugin: Contact Form 7. In your backend admin page, you can see required plugins. Follow the instruction and you are ready to use Corporator.