I hope it works :)
goncalo16
You may need to customize a custom path (that's default path)
I wrote this mid in night..
.. currently don't know why, but after using it I get an error message..
.. but rename works nevertheless!
(gci is short for Get-ChildItem)
To be on the safe side, maybe try it with a dummy first
Edit: You can ignore this error message (double folder names) with this addition at the end: -ErrorAction SilentlyContinue
gci "$Env:USERPROFILE\Documents\DVDFab\StreamFab\Output" -Recurse | Rename-Item -NewName {$_.Name.Replace('Amazon','AMZN')} -ErrorAction SilentlyContinue