Maybe an admin can help. I'm clicking on the insert image icon above. Then using the 'From Computer' tab I'm hitting the 'Browse' button. From there I'm selecting the image that I want and clicking on the 'Open' button. Then hit the 'Upload File(s)' tab.
Yes - it's an admin issue and maybe Brett can help. It's been like this for me for quite a while but not a huge deal in the big picture of things.