Sure. First off, WS_FTP isn't a Microsoft application, but you're right in that it runs on Microsoft Windows. Sorry if that sentence just confused you.
There are a few general WS_FTP LE tutorials out there.
If you have recieved your welcome email then you should have all your details in there. That is the "server" which you should connect to as well as your username and password.
See if those tutorials get you started. If not, let me know and I'll try and see if I can help walk you through the process.
Hope this helps.