RavenDB 2.0 first backup: Could not load file or assembly Raven.Abstractions

I am running my RavenDB backup batch file for the first time since upgrading to RavenDB 2.0.

This is the command:

C:> "C: \ Program Files (x86) \ RavenDB \ RavenDB-Build-2230 \ Backup \ Raven.Backup.exe" --url http://localhost:8080

--dest = "c: \ temp \ RavenBackup"

And this is the error:

System.IO.FileNotFoundException: Could not load file or assembly 'Raven.Abstractions, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = 37f41c7f99471593' or one of its dependencies. the system cannot find the file specified.

I checked RavenDB.net and the backup procedure looks the same as before for RavenDB 2.0. What am I missing? I could start moving assemblies in the RavenDB folder structure, but I don't think that's a good idea.