EventGhost is an automation tool for MS Windows, that can be extended through plug-ins. Please visit http://www.eventghost.net/ to find more info and the latest release.
...That is a much better working, more stable and more safe than this service. This service has been created for the platforms which are not supported by Dropbox (like Raspbmc).
Check the Dropbox site for their native Application.
The Advanced Launcher add-on is able to launch any Linux and Windows applications that support command line instructions directly from the XBMC GUI. This Add-on also provide the possibility, to download from several Internet databases and manage meta-data informations and images linked to these applications.