Problems with Notepad++ FTP_Synchronize Plugin

I was excited to find out recently that Notepad++ has a plug-in that will allow you to edit files on an FTP server. The plug-in, which has come with Notepad++ since v4.7, is FTP_Synchronize. Unfortunately, although I’m on Notepad++ 5.2, the plug-in did not work out of the box for me. While I could connect to and browse my FTP server, any attempt to download a file resulted in the error “Unable to create directory for file C”.