I have just released an updated version of ModelConverterX, check out the thread on the forum to see all changes. This time mainy improvements in the reading functionality and some small new features. The bigger new features that are planned have not been implemented yet. Hopefully I can add some in the next release.
Another thing that is really needed now is a manual for this tool, as I start to get requests for features that have already been implemented (but not yet found apparently). So I started with the manual on the Wiki, although it is still quite empty at the moment.