So many bug reports in a row, huh? Oh, well, if I have a grouped .dmx (8 mesh objects, all grouped to "vz_mare"), I can't set the flex type (simple/advanced) for it (3 of the mesh objects have shapekeys), unless I tick the "Supress" box. (Yes, I have tried selecting a mesh with a flex. Didn't work. It neither worked when I clicked one of the meshes in the "Group properties".) So what if I want to export 1 grouped .dmx with advanced flexes rather than 8 different .dmx files? Is that just impossible, or...?