On the web and on the mobile Manager app:
1. Click on the Events tab on the left sidebar in Bandsintown Manager
2. Hover over the three dots next to the event you want to update and click Edit from the dropdown menu
3. Click on the camera icon on the bottom right corner of the current image
4. Click on the camera icon on the bottom left corner
5. Select the new image you want to use from your computer
6. Click on the checkmark on the bottom right
7. Click Save or Publish or the checkmark in the top right
Note: Your event photos will default to your profile photo if you don't upload a separate one. The event photo will be displayed on the Bandsintown event page and the mobile app but not the Facebook event.
Please note that all images on Bandsintown have a dimension limit of 2048x2048.