I .. don't think so. All I can tell you is what I do, which is what I recommend.
- Backup your files as you did.
- copy the save state and memory card directory somewhere else (using a file manager like astro).
- point fpse to use the memcard and save state directories - menu, misc, save state/memory card, then browse to the folder/file.
the only thing I can recommend is that you plug the sdcard into your computer, then use a file recovery program to scan your card to see if there's anything you can recover. you should do that IMMEDIATELY, as the location on the card where the files exist may get overwritten - and then you have no hope. it may be too late now already. to get a file recovery program - google it. There are a lot, most want you to buy them, there are some that are free if you can find them in the flood of results.