Please search or read the FAQ from the keyclone developers website.

http://www.solidice.com/keyclone/faq.html#kc_faq_16

* can i move it to another machine
yes. your license allows you to move your activation to whatever machine you wish... but that process is a manual one, and requires interaction on my part (in other words, it could take a day or 2). contact me with your old system id, new system id, and your email address you used with paypal. once i have those, i will invalidate your old license and activate your new one. (i really should make a webpage for this...)
PM Keyclone with old and new ID