Thanks in advance for your help, I am willing to try anything! Have posted about this bug in another subforum, but I foolishly tried my luck and started another save. Surprise surprise, it cropped again. At Turn 150, something happens that causes the game and AI to become irreversibly stuck - I can't reboot ai.dll or use any of the modding tools to continue with the save. To recap from the other thread, I've already tried:

1. Updating Windows, NVIDIA drivers, audio/video codecs, verifying game files

2. Going back to a previous autosave and playing forward

3. Closing all pop ups, including greyed out ones. Using the debug mode to close all pop ups and notifications for all AI factions.

4. Using debug mode to reset AI.

5. Starting in Windows 7 compatibility, admin mode, etc. Disabled all anti-virus protection, checked permissions for Documents and other folders, disabled OneDrive, etc.

6. Editing and fixing NVIDIA settings including adding the game.

Posting my files to see if, God willing, anyone can help me fix this game. I remain amazed that Amplitude could release and work on a game for three years that becomes completely unplayable. 

DxDiag.txt

Diagnostics - 2020'11'15 @1549'11''.html