Hi I know that you have some issues while exporting a car with the max plugins.
Could you try the following:
1) delete the plugins from the steam plugin directory
2) verify steam files
3) update the newly downloaded plugins in the max directory
4) re-export
if this causes the same issue let me know with a PM
Could you try the following:
1) delete the plugins from the steam plugin directory
2) verify steam files
3) update the newly downloaded plugins in the max directory
4) re-export
if this causes the same issue let me know with a PM