Suddenly, without upgrading the app or making any system changes Duplicati is no longer launching.
If I launch app from terminal I get errors (see below). If I delete Duplicati-server.sqlite file the app works again but all my settings, databases etc are gone.
Crash! System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Exception: A serious error occurred in Duplicati: System.Exception: Failed to create, open or upgrade the database. Error message: The database has version 5 but the largest supported version is 4. This is likely caused by upgrading to a newer version and then downgrading. If this is the case, there is likely a backup file of the previous database version in the folder /Users/MacMini/.config/Duplicati. at Duplicati.Server.Program.GetDatabaseConnection (System.Collections.Generic.Dictionary`2[TKey,TValue] commandlineOptions) [0x0023b] in <5ce7873446514fd69c1c6b28a3dc0d2