I was personally very strong fan of FDM and doing stuff with VB was real magic with all sorts of mapping etc.
Bu now FDMEE is the future and we have to move ahead with Jython .
FDM classic will be supported till 220.127.116.11.500 and after also patch .700. After that version there will no longer be further bug fixes.
So Starting from 18.104.22.168 you can have only FDMEE where a migration from FDM to FDMEE would be required.