I had a Next YE2000 CX super plus installed in my apartment in Marmaris Turkey. I have got twin transponders to receive Astra and Hotbird. A local installer said he could supply keys to unlock channels if I provided a USB key. This I did and he just plugged it into the receiver and immediatly updated it. It uses a softcam.key. My question is how do I do this for myself when the keys change?