To make sure that you have cleared all previous collection data, you can simply uninstall the application from the “uninstall software” section in Windows settings. If you do not want to delete the application and redownload it, you can also delete the epadd-settings folder, but it is not required. If the epadd-appraisal folder is non-empty (and contains a user folder) you will not get the ingestion screen again when you launch ePADD, so you will either need to remove the “user” folder within the epadd-appraisal folder or delete that folder all together. Some fields of the import screen will remain filled because they are stored in your browser cache. To clear these, just clear your browser cache.
In a nutshell, either delete the application, or delete the epadd-appraisal folder (or the “user” folder inside epadd-appraisal), the epadd-settings folder, and clear the browser cache.