Bill, rather than using Filezilla, you could use WinSCP. It's free.

It can be used for transferring files like Filezilla, but can also be used from the command line. In the past I've used the command line to automate transfers (so that they run at set times each day, to download or upload files) - but you could have a script that you just double-click on demand. If you exported your website files from Xara Designer to the same folder on your computer each time, you'd be able to double-click on a .bat script on your PC and it'd use WinSCP to upload all of those new files to your hosting account automatically.

You could even assign a Windows shortcut key to run the .bat script so that you don't even need to double-click anything.

If you contact me privately I'll give you a hand with getting it going, and once you've seen it working, you could report back here for future users who find your messages and have the same kind of problem.