WP Voting Contest is very easy to install and can be installed via the WordPress Admin’s Plugins panel. Once you have received your download, navigate to the WordPress Plugins menu, go to the Add New page, and select the Upload tab. Upload the wp-voting-contest-2.3.9.zip file you received after purchase.
The first thing you need to do after you have the plugin installed is to activate the plugin and enter your license key. Go to WordPress Dashboard > Contest > License
Once you activate your license key you will automatically be notified of updates. You can manage your license through Your Account if you need to deactivate it and then activate it again. This is useful if you change your domain name.