FTP Explorer can be launched from the command line, or from within other programs as long as the syntax for the desired connection meets a few simple requirements.
The syntax to launch and connect to an existing profile is:
ftpx //profile_name!/initial_path
The initial path information is optional, but if included must be separated from the profile name with an exclamation point.
The program will also accept standard FTP URLs from the command line such as:
ftp://ftp.server.com/path_info/filename
The path information and filename are optional parameters, but if included, the connection will change to the path listed, and attempt to download the file.