Click Start Uploading and find the image you want to upload. Click Upload button to upload the image. Always select "DONT AUTODELETE" the image in the "auto delete image form"
After upload change the "Embed Codes" to "HTML full linked"
Copy the link only until the pic format just like the picture below. Example the image I upload format is .PNG
Paste the link of the image that you desire to change / edit the Image of your WEBPAGE.