The new version of FS ACARS is now available to all at http://www.satavirtual.org/fsacars/.
This version's code was completely re-written and many new features were added. A new interface, custom aircraft files, new log features, possibility to download flight plans and fuel load from your VA's website, auto-position table and the uplink messages including ground stations for VAs, were implemented.
Also, FS ACARS 4 will now evolve into a Plug-In phase - this means that no further functionalities will be added to its code. Changes can be made to the web-based systems and developers can create their own custom DLL plug-ins, for private or public use, which will be integrated in the next FS ACARS versions, and for that a SDK is now available. FS ACARS team is still working in developing general web-based system based in the current features presented in it's SDK, which will be made public as they are complete.
Full features list, support and download are available in its website.