When you are logged in as admin in the YAWL control center, you can import and export organisational data via a simple click of a button in section Org Data. But what if you want to start from a clean slate and delete all organisational data? Deleting roles and users one by one via the YAWL control center can become tedious. There is a very simple workaround for that: in the engine/apache-tomcat-7.0.65/ directory of the standard YAWL installation there is a directory called databases. Stop the engine and delete the databases directory. Restart the engine. All organisational data are gone. NOTE: this also deletes all loaded workflow specifications and cases.