Happy Tails

I have had my BL for probably a little more than 2 years. Anytime I used the embroidery on it, I connected with my computer. Well today I had the bright idea that I wanted to move that machine to another table, so I could leave it set up for embroidery. Well I d/led a snowman and put it on a memory stick and my sewing machine just went blank. I phoned my friend, who doesn't have a BL but she asked if maybe I needed to upgrade and so I did. I then put the memory stick in the sewing machine and it said upgrade complete. Turn your machine off then on again - so I did......Now I have a screen asking me for a certification key with a keypad underneath. I cannot for the life of me find anywhere that mentions a certification key. Anybody out there that can help me??? Thanks, Wendy