Copio y pego de la web de NI: http://www.native-instruments.com/forum/showthread.php?t=124423
What is important to know about the public beta version?
- It will be unlocked with your existing serial number
- It requires (and overwrites) a previous Kontakt 4.x installation on the same computer
- It will expire on February 15th 2011 (the official 4.2 update or a new public beta build will be made available before that date)
- If you want to revert to the previous Kontakt version for any reason, please run the master installer from the original DVD set, then install the latest official 4.1.3 update.