Maybe that helps:
1. Run this draft script and open your library when it prompts:
fileOpenMatLib()
undo off
disableSceneRedraw()
size=1
for i=1 to currentmateriallibrary.count do (
print currentmateriallibrary[i].name
thisbox=box length:size width:size height:size mapcoords: true
thisbox.position=[i*size,0,0]
thisbox.name=currentmateriallibrary[i].name
thisbox.material=currentmateriallibrary[i]
)
enableSceneRedraw()
redrawViews()
undo on
print "Done."
2. Be patient :) It will take a while. It creates a box with every material from the library
3. Convert/relink - do whatever you want with the materials
4. Save the file as Max file
5. Open Material library in the material editor, make sure the filetype is set to *.max
6. Save the library as you like
but the corona converter cant run here because its a gui script that just shows a number of things for the user to do
BTW: Does not help you here but you can use the converter without UI by script, see
https://www.racoon-artworks.de/CoronaConverter/mxsDocumentation.htmlNewer versions may be different because Martin does not maintain the Converter any more, but the docs are still there (would be nice to get some updated ones by the Corona team).
Good Luck