It seems that Digi-Key/Mentor is ending PADS maker, and are offering a one-year licence of PADS Standard instead. I've received an email with a link to download the software and a code to generate an ethernet-MAC tied one-year licence.
I assume the idea is that at the end of the year people will pay for a full licence - although I'm not sure how many people who used a free tool will want to pay $5000