To signal MDriven to drop everything and re create the schema you go like this:

1. Make sure you have the model locally in MDrivenDesigner
2. Delete ALL VERSIONS of the model in MDriven Server - so that the list is empty and contains NO MODELS
3. Upload the model from MDrivenDesigner
4. MDriven Server will now find that there is no old model to evolve and it will recreate the database as a result

Tip: If you are in the portal, on a site, there's a link to the MDrivenServer. On that page, you also have the username and password for the MDrivenServer.