Unfortunately, Selkie Rescue is designed to work on recovering data from the hard drives of PCs and laptops, and not from cameras or flash cards. We can pull data from the camera if it is hooked up to a computer, since that will recognize the camera as a ‘data storage device’, however it does not sound like that is what you need.
We suggest doing an internet search for software using keywords that reference “recover” or “undelete” and “flash cards”. Make sure what you find works for your particular camera and flash card model; you may need to contact your camera manufacturer. We hope you find what you need.