OK, it looks like there are two things to check – firstly, have you deleted the image from the media library? When I went to check it, the system told me it could not find the actual image, which might explain why it is not showing.
Secondly, if you can still find it, or you do upload it again, I wonder if it’s the wrong format – I doubt WordPress can handle .bmp as an avatar image. Could you convert it to .jpg or .gif, and try with that?