SecureFTPConnection is a subclass of FTPConnection and supports all the functionality of this class. In addition, SecureFTPConnection offers quite a few other features such as directory transfers, asynchronous methods and SOCKS/HTTP proxy support.
So it's perfectly fine for you just to use SecureFTPConnection (with Protocol=FTP). In fact, we've designed the class with this intention in mind.
- Hans (EnterpriseDT)