Please help, i have been flying fsx steam on Windows 10 for some time, i had a scenery library full of addon scenery etc. All of a sudden 2 days ago the scenery library in settings area was blank. only the enable boxes where still ticked. The scenery area from 1 to 251 was blank. Twice uninstalled and re-installed, problem persists
When you uninstall you may be leaving files, folders hidden on your computer.
You also have to clean it all from the registry.
Try this and see if it helps.