KORG Gadget v3.7.2 now available on iOS 9.3+
Now supporting the new Module Organs and Clavinets pack (free for anyone who had purchased the now discontinued previous Organs pack), improved MIDI file import etc.
Note: No more support for the Alihoopa music sharing community.
I'm not sure if folders are supported now, haven't updated my own version yet.
AppStore Link: https://itunes.apple.com/app/korg-gadget/id791077159?l=en