Hey Thal,
I'm getting a game crash when trying to install 8.6.12. I've removed all other mods and have cleared out both the cache and moduserdata folders but still crashing on install. Looking through the log files there were 2 that included references to errors...
Database
[694.547] constraint failed
[694.547] While executing - 'INSERT INTO ArtDefine_StrategicView(StrategicViewType, TileType, Asset) VALUES(?,?,?)'
[715.685] Validating Foreign Key Constraints...
[715.685] Invalid Reference on ArtDefine_Landmarks.LayoutHandler - "SPECIAL" does not exist in ArtDefine_LandmarkTypes
[715.685] Invalid Reference on ArtDefine_Landmarks.LayoutHandler - "SPECIAL" does not exist in ArtDefine_LandmarkTypes
[715.685] Invalid Reference on ArtDefine_Landmarks.LayoutHandler - "SPECIAL" does not exist in ArtDefine_LandmarkTypes
[717.089] Failed Validation.
[717.885]
xml
[715.670] **** Validating Game Database *****
[717.089] Performing Localization Checks
[717.089] Checking Tag Format...
[717.089] Note: Tags must only use [A-Z_] characters, start with 'TXT_KEY_', and be under 128 characters long.
[717.105] Validating UnitGameplay
[717.105] Number of selection sounds doesn't match number of units.
[717.105] Validating Notifications
[717.105] **** VALIDATION FAILED *****
[717.105] Validation Took 1.435582 seconds
[717.869] **** Validating Prefetch Process *****
[717.869] **** Validation Success *****
[717.869] SetGlobalActionInfo
[717.885]
Hopefully you'll be able to piece together what the problem is here...let me know if there's anything more you'd need from me to nail this one down.