Larry, I saved the pic at the chalky sticks site as a PNG (lower left corner icon). Then I copied that url and pasted it in behind the image icon on the menu bar.
But you also can just right click on the saved PNG image at the site, save the image to your computer, and then use "Upload Attachments" below the text box. That's how I uploaded the same image below. If anybody knows of a more streamlined method, holler out. Still getting used to the new format.
I also just found an older version of the tool here that might be more functional for some folks. It looks a lot like the old WEI w/o being able to post out the diagram to a site. You still have to copy/paste apparently.
https://pad-v1.chalkysticks.com/