The link you shared suggests that only SHA-1 Certificates should be affected. I can confirm it also affects SHA-256 certificates, counter to what it says should be happening.
This has rendered an entire batch of professionally created CDs unusable, causing a massive issue for myself and my client. Please can you respond with more info about how we fix this. We do have an updated version with a new certificate which installs, but that's no use to people who bought a CD of the software before the 30th October and now can't use it.