You may want to delete your Hopin event for a number of reasons. Whether it was a test event that you don't need anymore, or you had to cancel your main event, here is how to delete an event on Hopin.
Deleting an event
There are two ways you can delete your event.
The first way is by going to your Organizer Profile > Events. Here, find the event that you would like to delete and click the three-dots. Select Delete from the menu that appears.
Alternatively, from within your Event Dashboard, click on the three-dots next to your event name in the top left-hand corner. Click on Delete Event. 
A pop-up will ask you to confirm that you would like to delete your event. Click OK and the event will be deleted.
Why do I not have the option to delete my event?
Note: You cannot delete an event with registered attendees.
If you have any registered attendees, then you will only see the Duplicate Event option when trying to delete your event. If you would like to proceed with deleting your event, you will have to manually remove attendees from the Event Dashboard > People > Attendees page. Only then will you be able to delete your event.
If attendees paid for their event tickets, removing them will mean issuing a refund. In other words, if they had paid for your event, it is not possible to delete the event without refunding attendees.
Go to the Event Dashboard > People > Attendees page. Find the attendees email addresses using the search box and then click the edit button next to those that you need to remove.
On the modal that pops up, click the Refund ticket and Block buttons.
Once all attendees have been removed, follow the steps above and the Delete event option should be available to you.