In Need!!

i found a program called Registry Mechanic, and the registry key and stuff works great the first day, but on the second day, the program asks me to register it again, so i tryed the same registry key and it said that it expired, but then i used my other computer and it worked great on the first day too, but same thing happend on the second day, so i was wondering if anyone here noes a crack or a permanent(or a longlasting) registry code and serial number that i could use, thx!!!