(Thanks to Kalman Toth for these instructions.)
Use the Forum Editor method to Insert Image:
1. Save the image to disk
2. Use the Insert Image (right most) icon to upload the image
3. Drag and drop your image file or click [+ Upload] button
4. (If click [+ Upload] button above) Select the image and click [Open] button
5. Type alternate text if you needed and click [Insert] button
(Thanks to Todd McDermid for this tip.)