@felixmcnulty
You are my savior. After banging my head against my PC for hours with exactly the problem you describe, I was all set to try to use my MacBook, only to find that I couldn't download the Mac version because I had already downloaded the Windows version. Like you, I am old-fashioned and keep the CDs even though I had to dig out an external drive that I bought 2 years ago and hadn't ever opened. What you did worked for me too.
Thanks!!!
