[DirectorTsaarx]

Based on the discussion here and in the Pirate thread, I attempted to add a Racial trait to SE4. As others have noted, it works fine IF you:

A) create races from scratch ("Add New")
B) let the computer generate random races

Which is what I expected, since I've done this before.

HOWEVER, if you attempt to "Add Existing" races after adding the racial trait in, an error message pops up stating "Can Not Load <empire name>.emp". So there must be something in the .emp file that doesn't work well with new racial traits. The workaround is generating new .emp files, which basically means creating each race from scratch, according to settings in appropriate General.txt files, and saving those races after the game starts.