Hi thanks for the reply. No. It is not an audio effect, but video effect. See: https://www.nchsoftware.com/videopad/versions.html (version 6.31). I have used it and worked very well. Smoothens the footage amazingly good!. So, hope that it will be back soon.
In version 6.31 a very cool feature has been released: Noise Reduction. But now (version 7.00) it seems to be gone. Can someone give me an upate when Noise Reduction will be available again?