Upgraded my machines, can confirm the Windows machines all got the service file so they seem to be fine.
The one issue I still have as reported with .104 is one Windows server I’m still unable to rebuild the database after using deleting+repair:
2026-06-24 21:21:55 +02 - [Error-Duplicati.Library.Main.Controller-FailedOperation]: The operation Repair has failed
UserInformationException: Some zero-length metadata entries could not be repaired.