To upload your data from Wizard's Event Reporter to the site, you need to download a small helper application.
When you start the application, it will list all started events in your WER database. By default, only events started today are shown, but this can be configured in the Options. Next to each event is a checkbox. If you tick this box, this event will be monitored, and any changes made to it will automatically be uploaded to the site. Once the event has ended, the monitoring will automatically turn off as well. If you want to upload an already ended event, just tick the box and a single upload will be made, then it will be unmonitored again.