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I'm not sure if this is a bug or not, but while my friend and I were playing, I called in a V2 rocket and it happened to destroy my friend's Drache Bomber, and it made his game crash. I've had other small crashes like this before, usually involving troop movement or call-in items.
the relicCOH.exe should be inside the steam/steamapps/common/CompanyofHeroes folder inside ProgramFiles(x86)
(or just plain Program files if you run 32-bit)