Stopped recognizing my computer

Works well at reducing noise. I was happy with this application which I purchased from the Apple App Store a few months ago and would have given it a higher rating, but today it gave me a message that it was purchased on another computer (not true) and asked me to redownload from the App Store. I may have been charged again for the download but am not sure as the App Store did not confirm the transaction one way or the other.

Buz365 about Noiseless