If you want to change your calendar preferences, OR for some reason events are no longer automatically appearing in your calendar, we are working on an easy fix for you that makes it easier to change calendar preferences/sync event registrations to your calendar.
For now, please try to uninstall the app and reinstall it, then the next time you join an event, it should ask you which calendar you want to use.
When you join an event on the web, on this congrats screen, you’ll see a “Set a calendar reminder” heading with choices to sync the event to your Google Calendar or iCal or Outlook calendar.
If you are creating the events on your desktop, then you should be able to join them (and not pay), and then add the event to your calendar, per the process above.