Call me stupid, but just tell me how to change my old photo (showing beside my posts) with my new photo (showing in my profile and in the editor column). At least before there were fields from which to upload images, even though they weren't solving my problem. Now I can't locate such a field and I can't locate this "Publishing Centre" mentioned in the guide.

Any help will be appreciated, since it is the third time I am trying to get someone to help me solve the issue in the last couple of months...