While we were working on the last MXU Nationals a few issues were found with the Eco.Res. The TD_Res has now been updated along with the full list of MXU ESTs to go with them, you can find the latest and greatest available from the Download page..
Make sure you download the TD_Res.zip if you want to Run the MXU tracks or tracks using the MXU Eco systems, even if you're not a track designer.
Laurie