After install, I made a jeep with a winch, And it came up at the top of the screen saying
that the sound file hadn't been found, and I should check my installation,
After reinstalling, Deleting and extracting files to and thro, The error is still there,

Anyone?

Cleaning old issue

Try it again on a fresh KSP install with KAS being the only mod installed.
Also, logfiles please.