It can't be done unfortunately, but you could just add the image in again as standard as the image you want is likely to be on one of the 5 pages of your recent images.
You can still do that, it just isn't a conventional method. Copy and Paste your image (or better yet, copy, paste, cut, then paste again, putting the image at the end of the sequence). This will retain the image size you want. You can then move this around using arrow keys (+ shift for extra distance per press) or click and drag it around as usual.
When I Copy and Paste nothing happens. Is this a memory issue or just a bug?
Copy and paste should work. Its Ctrl+C on Windows to copy and CMD+C to copy on Mac. It's Ctrl+V to paste in Windows and CMD+V to paste on Mac.
Does copy and paste work after restarting VideoScribe?