The Rad File, being a web file manager consists of two main components; a web application and an applet. The web application is available as a PHP edition and a Java edition. The choice of which edition to download is entire upto you, they have identical functionality. However the java edition can only be used with a Postgresql database server while the web application written in PHP can be used alongside both Postgresql and Mysql databases.
Installation Guide
Both versions can be installed very easily even though the installation process differs.
Installing the PHP Edition | Installing the Java Edition
Web app. configuration
Both forms of the web application can be configured with the same set of parameters. However they are presented as separate documents since the way the parameters should be entered differs for the two systems.
Configuration guide for the PHP Edition | The Java Edition
System Requirements
The client applet only needs a java powered browser, the web application requirements depend on which edition you download.
System Requirements for the PHP Edition | The Java Edition