As of version 3.2.08, WP-Filebase includes an extension system.
The extensions can be browsed and installed directly from the dashboard. All Cloud Sync services (apart from FTP) have been outsourced to additional extensions that must be installed after the update! The reason is to prevent software bloat (more features and thus more code can slow down your WordPress) in respect to future functionalities.
Another aim is to lower the price of the Core plugin so that you don’t pay for what you don’t need. Extensions for outsourced features that were existing in the Core when you bought your License will always be free!