First Install the free version and enable it.
Then install Premium Version enable it aswell.
Make sure the directory name of premium version is “wp-fastest-cache-premium”
Sales Page
http://www.wpfastestcache.com/
Download
http://mir.cr/1ZMQCCO4
http://www31.zippyshare.com/v/7cZ9mnbM/file.html
Password