That's not a solution, because you can't remove a trait that is not there. No EB character has the Immortal trait, so that is NOT the problem. The issue is clearly something inherent in the exe hardcode.

I have been playing with the Alex.exe for a few decades now, and it seems to be working fine except for the undying generals. I can imagine going back to the BI.exe only to have my empire erupt in revolt after all the generals die. There have been some good points, though: the AI is a little wiser when attacking uphill (they wait for you at the bottom of a steep incline rather than exhaust themselves going up it), for example. I haven't seen any other significant improvements, so I think I'll go back to BI.exe.