Keygens depending on the program are a kind of id or user (serial) number. They work almost always but on many programs one cannot upgrade or register the program. that's the point. Please do not use that kind of programs that much.
Another proggy that you can use outside of CrackSearcher is one that is called CrackDown by HiSoft V.22.214.171.124. They are both equal and reliable. At the present time they seem to be the 2 best one's out there to obtain what may be needed by you. Thank you,. Porky Butts Sr.