Is there a way to update characters/scenes?

I don't know of any way other than deleting the existing one and then uploading the updated version, but maybe there is a better way?

Does anyone know?

Tnx! ^^

There's no built-in way to update a post, but you could upload a new card and write it's post ID in the old card's parent field. This will stop the old card from show up in any searches since it will be marked as a child post.