Does it crash to Desktop?
It should catch any errors and not crash.
This is the offending code, remove the line in Red.
<ExtremeTypeModifier>
<Modifier>
<EffectType>Promethion</EffectType>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>5</Value>
</Modifier>
<Modifier>
<EffectType>SensorPower</EffectType>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>12</Value>
</Modifier>
<Triggers>
<OnEvent>OnConstructShip</OnEvent>
<Scope>Queue</Scope>
<Target>
<TargetType>Ship</TargetType>
</Target>
<Lifetime>Target</Lifetime>
<Modifier>
<EffectType>ShipRange</EffectType>
<Target>
<TargetType>Ship</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>3</Value>
</Modifier>
</Triggers>
<Triggers>
<OnEvent>OnColonizePlanet</OnEvent>
<Scope></Scope>
<Target>
<TargetType>Faction</TargetType>
</Target>
<Lifetime>Instant</Lifetime>
<Modifier>
<EffectType>Promethion</EffectType>
<BonusType>Flat</BonusType>
<Value>5</Value>
</Modifier>
</Triggers>
</ExtremeTypeModifier>
Can you take a look a the logs ...Documents\Galactic Civilizations III ToolBox\Logs.
See if there is any reason for the crash.