TS2021 *suddenly* crashing on startup in Windowed mode.

I just changed the graphics settings so that the game would run in windowed mode. I then shut the game down so that the new setting could take effect. The game started up normally, but then threw up the typical O.O.M excuse while it was trying to update the scenario database. I verified the game files with Steam and everything checked out. I then restarted the game with LogMate running and I got this:
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "Kuju\"
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "
d
Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "ml"
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "Kuju\ilSimul"
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 266 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "RSrker.xml"
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Tutorial Scenario Marker.xml"
2021/05/19 11:48:50.398 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: editor\gizmo\scenario markers\standard scenario marker.xml
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "rail\"
2021/05/19 11:48:50.398 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: editor\gizmo\scenario markers\standard scenario marker.xml
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "editor\gizmo\scenario markers\standard scenario marker.xml"
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "Kuju\L"
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 266 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:00.624 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "
\RailSimulatorCore"
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 266 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:05.731 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
This crash is occuring on both 32-bit and 64-bit modes.
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "Kuju\"
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "
d
Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "ml"
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "Kuju\ilSimul"
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 266 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, ilSimul
2021/05/19 11:48:45.303 - [Content] -
2021/05/19 11:48:45.303 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:48:45.303 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "RSrker.xml"
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Tutorial Scenario Marker.xml"
2021/05/19 11:48:50.398 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: editor\gizmo\scenario markers\standard scenario marker.xml
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "rail\"
2021/05/19 11:48:50.398 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: editor\gizmo\scenario markers\standard scenario marker.xml
2021/05/19 11:48:50.398 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "editor\gizmo\scenario markers\standard scenario marker.xml"
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "Kuju\L"
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 266 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found : Kuju, L
2021/05/19 11:49:00.624 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:00.624 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cEntity.cpp : 1256 = Missing blueprint set "
\RailSimulatorCore"
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 266 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 417 = Blueprint set not found :
, RailSimulatorCore
2021/05/19 11:49:05.731 - [Content] - Trace cBlueprintLibrary.cpp : 448 = Blueprint set not found for: Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml
2021/05/19 11:49:05.731 - [Content] - Trace cEntity.cpp : 1272 = Missing blueprint "Editor\Gizmo\Scenario Markers\Standard Scenario Marker.xml"
This crash is occuring on both 32-bit and 64-bit modes.