All's well that ends well, I guess. After all the trials and tribulations, I now have Version 2 and the unlock code worked the first time. I do like it.
For others: Topaz seems quite addicted to discounting. I think you'd have to be pretty oblivious to pay full price for anything. Their best deal seems to be 30% off any product, which is what they are running now. Discount code: bw2intro and it's good until the end of the month.