Hey @Rosa Maria,
By default our Events List widget does not add images to events – so, if there are images on your site, these might be coming from your theme or from custom code or something. We cannot help with either of these things – but before jumping to conclusions, can you share a link to where the Events List widget is visible on your site? I will look at it and some of the images within it to learn more.
Next, can you share your “System Information” with us? Here’s how → https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Thanks!
George