Hi,
Original topic:
https://forum.simutrans.com/index.php/topic,22803.0.html
1) I have tested this and the game no longer crashes after clicking on "Upgrade" after using "Line Management" and "Replace Vehicles".
2) I did notice some unintended behaviour: there's an upgrade available for my vehicle (train), but when using the "Replace Vehicle" menu and "Upgrade" through "Line Management " it does NOT show me the available upgrade. When I send the train to the depot manually, it SHOWS me the available upgrade.
https://i.imgur.com/sjR8X2e.png
:P