Im Fuckin Pissed!!!!!!

I bought kinetic Cakewalk Back around last NOVember. I have been working on my album since then and I am pissed that my program is missing. I had to register for mp3 encoding for 19 bucks and I needed the serial number for it. I was givin about a month to use the trial mp3 encoding part of the program. The part that I dont understand is why I have to buy this part of the prgram when I already spent 79.99 at best buy for the full version anyways. I don't know If someone stole it or what.