Yesterday I had a major Windows malfunction on one of my Syncthing Devices…the one that has ALL the files for cloud backup. As a result of the Windows malfunction (not a problem with Syncthing) I lost my configuration and keys.
Because I had documented what directories were associated with each Syncthing Folder, and the settings for each, recovery took just a few minutes of configuration time. None of the files that I sync were lost, so I’m just waiting for the Folder scans to complete.