I use it.
Install as specified in the manual:
Installing the package
- unzip the max2msh.ms to the directory scripts\startup\ in your gmax directory
make sure you restart gmax afterwards or manually execute the max2msh.ms once
- unzip the GMaxMshGrabber.exe and GMaxMshGrabHook.dll to a directory of your choice
the dll should be placed in the same directory as the exe
- Start gmax
- Start Mesh Grabber
- Use Grabber's "grab to file" button and specify where should the mesh be saved
In gmax:
- Go to utilities tab
- Click "MaxScript"
- Chose "Export *.msh file"
- Chose "Dump to Listener"
- "Start export"
- You see the white frame in the lower left corner. Click it. Press spacebar.
The mesh grabber should display that the export has started.