Archive Pages Pro is a premium plugin. Please check out Archive Pages Pro.
Log into your WordPress admin (i.e., your dashboard)
Go to Plugins->Add New
Go to Upload
Upload the archive-pages-pro.zip file
Install and Activate the plugin
After activation, you can find the plugin's settings in the Dashboard under Settings > Archive Pages Pro.
Download the plugin zip file of the sales email you received
Unzip the plugin zip in a place you can remember for the next steps
Log into your FTP program of choice for your website
Upload the unzipped folder into wp-content/plugins
Log into your admin dashboard
Head to the plugins screen
Search for Archive Pages Pro.
Activate the plugin
After activation, you will be taken to the plugin's settings screen.