Turns out it was the AI_Settings, but I forgot to follow an earlier poster's advice and shorten the names. I mean I did, just Program Files/SE4, but the name of the mod directory was too long. It was indeed AI_Settings, and I copied the Abbidon because they had the same Personality Group settings. I now realize that, in the absence of such things as AI_Construction_Units, the default AI files will be used. So this worked. Thanks everyone! I've learned a lot
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