You could buy an installer packaging program which will add a registration key to your program, or you could roll your own. Rolling your own adds another level of difficulty to the hacker and reduces the payoff for cracking — all he exploits is you, not everyone who uses Wise or some major installer packager.
USB (Universal Serial Bus) Flash drives are getting so cheap you can use them as part of your security scheme. You can keep chunks of the program on them.
available on the web at:
optional Replicator mirror
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