Reply to David K: You're welcome! I hope you're able to upload your images - do let me know if not.
Reply to Amazing2: did you try to upload an image using the small tree icon? Dragging an image from your computer won't work - you'll need to use the tree icon. Just click that, then, within the 'My computer' tab, navigate to the image on your computer you want to upload, click 'Select', then 'Upload'. Your image should then appear.
Reply to Salino: Lovely image! And thank you for sharing your advice on reducing image sizes.