Deacon, this is what I do:
Use full editor and click on Attachment Manager. Add the image (no larger than 1 MB) and click on Done. Add any text and post to the forum. No image will appear once you post, only the small attachment thumbnail. Now, right click with your mouse on that thumbnail and select "Copy Link".
Now edit your post and use "Insert Image Link" button on the menu like we used to do before. A window will show up with the "http" address. Delete that partial address and right click with your mouse in that window and select "paste". This will paste the link to your image which you copied earlier. Now the code with your image link should appear in your text. Once you click ok and re-post, the large image should be there. Let me know if something is unclear. Good Luck!