Historically, Cool Edit Pro was often distributed as a "Shareware" version. You could download it, but features were locked, or it would expire after a certain number of days. To unlock it, you had to pay for a license. Since official licenses are no longer sold, users download the old shareware installer and hunt for the registration executable to trick the software into thinking it is a paid, full version.
: In the early 2000s, this was a standard method for distributing software. Users would download a "crippleware" trial and use a separate registration tool once they purchased a license. Key Features of Cool Edit Pro 2.1