I’ve been doing a command line restore with my small test backup, which is just ~1 MB, following the guide at Disaster Recovery - Duplicati 2 User's Manual :
Duplicati.RecoveryTool.exe download <remoteurl> <localfolder> --passphrase=<pwd>
Duplicati.RecoveryTool.exe index <localfolder>
Duplicati.CommandLine.RecoveryTool.exe list <localfolder> 0
Duplicati.CommandLine.RecoveryTool.exe restore <localfolder> 0 --targetpath=<targettempfolder>
But this does not recreate the database …