This is a small script for completely removing all references to missing plugins from your 3ds Max scene. For more details when running the tool, make sure to also read the info printed to the MAXScript listener.
Use with care (!) and do not save the results under the same file name!
The script will replace any missing plugin object with the first usable alternative object of the same class (e.g. a missing render effect will be replaced by the first available render effect). I cannot give any guarantees this will not mess up your data, your machine or your live.