Yes! - Now it works! I followed your instructions and now it all works perfectly - the base Toronto scenery must have been totally corrupted by some replacement file, it looked really weird. After cleaning the Custom Scenery folder I also updated X-plane with the standard package, before putting your sceneries (and Open Scenery) back in. I cannot really understand why it works now - as the corrupted scenery would have been in the global scenery folder, I guess, and what I updated, it seems, was things in the Custom Scenery folder, and among them not Toronto, it seems - but it does not matter