only thing I can suggest is to download ZERO ASSUMPTION RECOVERY onto your pc, delete the folders on the sd card (not format), then attempt recovery through ZAR. If the recovered files are still encrypted, you're never getting those files back without the encryption key anyway.
as an afterthought - before you do any of the above, copy the encrypted folders to your desktop, then if ZAR doesn't work, just move the folders back to the sd card.