Hi guys, You may know this problem already but since downloading TSW2 and adding East coastway to the game I now no longer can find this route on TSW2020. Its completely disappeared.
They only updated TSW 2020 to fix the issue with the game uninstalling. The add-ons did not get updated, which may be why those preserved add-ons keep disappearing when you have both games installed. Hopefully they will fix this soon.