I have recently purchased and installed the ATS routes (ohle pack, chat moss, cambridge-peterborough, kings cross-kings lynn) and I saw that they weren't available as a quick drive route. I only saw them in the standard tab with the list of scenarios. I like to play in quick drive, so is it possible to use the route in quick drive or can I only use the scenario editor to use the routes?
There should be quick drive for those routes. Off the top of my head I know for a fact Chat Moss has. I reckon your scenario database has become corrupt. It's a common thing with Train Sim. Go to.. [your drive]:\Steam\steamapps\common\RailWorks\Content and delete SDBCache.bin then restart the sim and let it rebuild the database.
Thanks for the tip even though a quick restart seemed to do the trick. All my routes are there now, but I will keep that in mind.