[Suicide Junkie]

Some sort of debug error while writing to the file, it kills the host process.

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If you want, you can go into settings.txt and set:
Create combat replay := False

Then go into techarea.txt, to the "Point Defense Missiles" section, and set:
Maximum Levels :=5

If you are playing a game without replays, there will be no problem, and you can take advantage of the expanded design options.