I have just finished the last feature still on my todo list for the next ModelConverterX release. That does not mean the wishlist is empty now, but for the version 0.5 release I have put everything in I wanted. This last feature I just added is the ability to edit attached objects, for example an effect or light. You can now change their position after you have imported an object. And it also allows you to create new attached objects, so that you can add smoke to a chimney quite easily.
To be able to specify the parameters of an attached effect easily I have also made an editor that helps you in specifying them. For example by making sure they are in the correct range. I hope this will be useful as well. Now all I have to do is update the manual and than the release should be there. Hopefully I can get that all done today.