Ah finally I was able to continue building, but one of the updates seem to have broken the trains...
Trains don't make a sound when leaving the depot, trains can't take curves (mine got stuck), created trains aren't saved (therefore they also don't save their cargo) and don't leave the depot automatically when loading the map.
And eraser is bugged as well, when the build menu is open and I click on the eraser and then click on a building in the menu again, the eraser button in the tool box is still active, when I click it to make it inactive my cursor changes to the eraser and button is reversed until I click a building again when the cursor is set to eraser.