Sashka-I bought the disc-ran it worked fine. Thought I plugged in the key, now it doesn't work, I try to log in but I get a blank screen with no options. I assume my 30 days ran out.

As mentioned in the Order Confirmation email you have to login with the same eBay user id you specified when made the purchase.
If you did, please check Help - About to see if the software is registered on your name.