It should be possible to write a sync script and link to it, to execute from a click on any icon. The result would be a desktop “sync” button that causes a sync. You could also run a sync at regular intervals as a cron job. Even if you don’t have a clue about how to write the script, it is easy to use Google to find an example to model your script on. There are two ways this might be done. One way would be to execute something that was designed to work with a given application. Another way would be to find the source and destination directories and just use the “cp” command and appropriate switches to update directories.