From my brief testing it appears:
Doesn't crash randomly like Android File Transfer.
Is still intel compiled.
Actually works well, I never got OpenMTP to work.
Only works for Kindle, not my Android device.
It installs next to Send to Kindle which asks for login, but you don't need to log in to use the File Manager.
https://www.amazon.com/gp/help/custo...EdEkbIhK07ysFu