Files that will not Unlock

Files will not unlock.

Other files will unlock.
These particular files had been moved to a different location and then put back.
Any thoughts??

Please describe exactly what you are doing and what you expect.
Please do not mess around with the encrypted vault files. You will most probably damage the vault structure.
You do not decrypt single files. You always unlock a complete vault and you work with the virtual drive that will come up after unlocking.