Adobe have just released a bunch of security updates for FMS. The updates appear to cover all versions of FMS and are highly recommended for installation. Usually – and I think this is the case here – these updaters are actually full installers of the server.
I would recommend to back up the existing FMS installation folder, run the updater and then check if the new install has preserved your config files and any other pieces that you may have previously modified. Also in the future if you require a Developer version just grab yourself the updater – no need to download the release and then update it.
Interesting: Amazon Web Services is one of the parties credited for bringing the issues to Adobe’s attention. Hmm, wonder what that may mean… I didn’t know AWS was using FMS… 🙂