If you right-click on the picture next to your post above and then select "Save Picture As..." from the menu that pops up (when you right-click) a save file window will open and the name of your avatar (looks like "gxp") will be the default name already filled in for you in the "file name box". Take note of where the file is being saved or click on "Desktop" on the left side of the open save file window that opened. You should then be able to find that same file when you try to save it in the owner registry.