" I think the answer is to FTP the whole new file of the same name over the file that is there and it will replace the contents, not add to the old folder's contents, correct?"

That will work....you 'should' also be able to delete any file on your 'free space' also using your ftp...I do this all the time with mine (the FileZilla I mentioned). I have not use WS-FTP for several years, preferring what seems to me to be an easier GUI in FileZilla.

I guess I never even tried to directly delete using WS-FTP...maybe some programs don't support that commnad...*shrug*

(It seems like some form of FTP is built into a number of programs these days....I have 2-3 filemanagers with it. Each requires a different set of steps though, so I have sorta settled on one.)