When (what release) and how was that set? It also needs to be in the service itself.
Duplicati Access Password
Change password with ServerUtil
Example change with a different context (might suit you if you never set service up)
You can have a tray icon to go with the service, but start it with --no-hosted-server.
Detached TrayIcon (This term confuses me between attached to service vs. nothing)
E.g. busy files may complain, which needs VSS (snapshot-policy), which needs elevation. Performance improvements via usn-policy also need elevation. Both are Windows rules…