How do I run the migration from Beta (SQLServer) manually?

We are currently installing the latest version of Octopus on a completely different machine because we wanted to test out some tools that we have built around it prior to upgrading the main server. However I want to run through the migration from SQL to Raven. The menu item for the beta migration just gives this message “Could not start Octopus tools: Please pass either -octopus or -tentacle as command line arguments”