Can anyone help me decrypt my .sav file? I have the movable.sed file

[omnicloud7]

I've been spending the past hours researching but I just do not understand how to decrypt. I seem to be given python scripts but I don't have any scripting knowledge so I'm stuck.
Anyone kind enough to help me? I have a the contents of my SD card plus the 3DS unit's movable.sed file since I was told those are required. Thanks in advance to anyone willing to help.

My goal is to convert this .sav file so I can use it with Checkpoint.

 

[Danius88]

Checkpoint and JKSV should decrypt the save files automatically when you extract them, do you have CFW in the console you are extracting the save files?