CompleteFTP is supplied as an executable Windows installer. It is also possible to customize and automate installation.
To install, double-click on the installer executable, and you will be taken through the steps required to set up CompleteFTP. You may require Administrator permissions to run the installer.
The trial installer installs both the server components and the Complete FTP Manager. The production installer by default installs both, but optionally permits just the Complete FTP Manager to be installed if required, so that it can be used for remote administration of a server installed on another machine.
Note that you will have the option of installing the Standard Edition, the Professional Edition or the Enterprise Edition. More details on how to select the edition can be found here. The trial edition can be upgraded from any lower edition to a higher edition.
Please note that CompleteFTP installs as a Windows Service, running as the local SYSTEM user. It will be started automatically when your computer starts. Once installed, run the Complete FTP Manager to begin adding users.
The trial edition expires after 31 days. Once the trial period is over, the server converts to Developer Mode, and will only accept connections from localhost (but will otherwise remain fully functional). CompleteFTP can be used in Developer Mode indefinitely. It may be converted to production mode by purchasing a license.
Once a license has been purchased, a trial or developer mode installation (or a production installation) can be activated as described here.
There are detailed getting started tutorials available that explain how to connect with Filezilla and WinSCP.