It may be desirable to run an Urchin profile multiple times to for the purposes of testing performance, filters and so forth, where the actual data generated by Urchin is discarded after each test. The simplest place to do this is from the Urchin Administration console. Select "Configuration" and then select the edit button for the configuration in question. Next, select the "Storage/DB" tab. Then under the "Clean DB" section, click the "Delete All Data" button.
Note; this will not delete the profile settings. It will only delete the report data for that profile, allowing you to re-process the log file(s).