Best answer by Mathis
There is no feature that allows for direct downloads. However, there's a way.
- Use Firefox as your browser on a computer
- go to your public profile
- click on your image
- now right click on the slightly bigger image that popped up and choose "show background image"
- You can now download the image (right click and choose "save image as". If you've uploaded a bigger version than shown, you can change the t500x500-part in the URL from the address field with the term original.