This is what you need to do to get them back:
- Login to the forum
- Find your posts
- Click the pencil symbol to edit them
- delete all attachments and images
- save the post
- Edit it once again
- Find the images on you computer
- Upload them again
- Save the post
When you have done this all should be OK.
A few things to remember:
- Image files need to be less than 256kb in order to upload properly
- If you find the images in Windows File Explorer, you can drag them directly into the post - very easy - just hold the Ctrl key down select them with your mouse and drag them in where you wan them