I've just uploaded the very first release of FTPSynchronizer. :)
Just unzip the file, and double-click on the JAR-file as usual. You can add Synchronizer-Bookmarks by clicking on Bookmarks -> Manage Bookmarks... Then perform a right-Click on "Bookmarks" (the folder Symbol) in the left Panel. Choose "Add Bookmark" then.
I think the rest will come by itself... :)