NDecrypt multiple files at once

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I am currently using NDecrypt via comand line to encrypt and decrypt .nds files one at a time.

Its quite a slow process, especially as i have a lot of files to cnvert.

Does anyone know of a program that will do multiple files at once or even a command I can enter for command line ??

Many thanks

Currently using "NDecrypt e -a XXX.nds" on individual files