If you use the software for just one hour a week for a year, that is 52 hours of active, creative entertainment. That breaks down to less than $1 per hour. Compared to the cost of a physical MIDI keyboard ($100-$500), the software is a steal.
The registration key acts as an access badge to this new form of entertainment. Without it, you are a spectator. With it, you are a performer. hot keyboard pro registration key hot