Brian and Mike are correct in what they have said and I would like to add a note to those who in the future plan to sell their own creations on the net...
1. If you make your creations downloadable as an unlockable shareware... be prepared to protect it from this very example.
2. Any software that can be freely downloaded and which can be converted to a full version by using a key is open to pirating.
3. Under U.S. Federal Laws (thanks to Bill Clinton) these pirates can legally hack your software for testing purposes and do so every day. (most true hackers are actually employed by the software developers to test their software vulnerabilities from unlawful hacking)
4. ENUs cannot protect you when it comes to Software Pirating.
5. Personalized Software is the closest thing to protecting your software you can get.
(e-mail me if you would like to know more)
A LOCKED DOOR ONLY KEEPS AN HONEST PERSON HONEST!
If you want your future customers to try your software before they buy it Give them a version which only does limited features that is not unlockable or actually programed in the software itself.
Same for games. Only Partial Levels should be downloadable.
Take Care in the Future.
Never give up trying. Just try it another way that works for you.