You can find the latest version via the following ways:
1. From the Web page
You can always find the latest version from the download page at http://www.foxitsoftware.com/downloads/.
2. Update Manager in the program
Open Foxit Reader, go to HELP>Check for Updates…If there is a newer version, it will be listed in the Updater.
3. Subscribing Newsletters
You can subscribe for newsletters of the product you are interested in at: https://www.foxitsoftware.com/mailinglist/subscribe.php, The Newsletter will keep you informed of news and new software at Foxit.