So I was creating a route earlier today. The editor crashed a few times but I think they were my fault. Came back to it just now and it's not there in the content browser, but it does exist (or seems to) on my disk. Anyone got any ideas - dragging the umap file into the content browser throws an unknown extention error?
Had the same problem. Open the console, use MAP LOAD FILE="../../Plugins/<Your Plugin Name>/Content/<Path to Map>" TEMPLATE=0 SHOWPROGRESS=1 FEATURELEVEL=3 to load it. It still may not be showing up in the UI, but you can open it through recent levels. I'd also recomment setting it as a favourite if the recents stop working.
Right that's working to get it open. My Route Definition and Station Directory files have also disappeared but are on the disk. I can re-import them but they only disappear again when I close the editor.
I've found that if I keep the files (such as my timetable) that I need to use regularly open in tabs, when restarting the editor it tells me that these files were open in the previous session and asks if I want to reload them.