I found this in the help part. Hope it helps.
*** Posting a Picture
To insert a picture in your post, select the “insert image” icon on top of the message box. This icon looks like a framed picture of a tree. Once you select this icon, you have the choice of attaching a file from your computer or entering the url (web address) for the image. Please note that the url must be for the image itself, not the whole website. You can usually get an image url by right-clicking on the picture and selecting “copy image address”.
When you add a picture using the url, there is an option below the uploader that reads “Retrieve remote file and reference locally.” This will save the image file to Quilting Board’s servers rather than link to another website. We recommend leaving this option on, so that the other website cannot change or delete your image ***