Lights are on in the day and the scenery appears washed

If you see lighting on during the day and the scenery appears washed, this is a conflict with a 3rd party addon which edits the X-Plane lighting system.

The primary addon that conflicts is UWXP (Ultra Weather XP), however this is true for any addons which alter the default lights.txt file.

Please disable any conflicting addons and restore the default lights.txt file, this can be done by running the X-Plane installer/ updater.