For a modern and secure alternative, you should use the latest QuickTime Player included with your Mac or a third-party media player like VLC.
QuickTime 7 Pro is a legacy application that is no longer supported or sold by Apple. While you might see "full version download" or "registration key" offers online, these are often associated with outdated or unsecure software distributions. Current Status of QuickTime 7 Pro QuickTime-7-Pro-Registration-Keys-Full-Version-Download
A simple one-button interface for capturing audio from USB microphones. For a modern and secure alternative, you should
Apple discontinued support for the Windows version in 2016 due to critical security vulnerabilities that will never be patched. For a modern and secure alternative