I've been with Cakewalk since 1995. If I change my email address on my accounts page, will I have to contact Cakewalk support to migrate all my product's registrations to my new email address?

You should be OK if you just change the address in your account settings. I did this recently, and there haven't been any problems...

Hi. I lost access to my old mail account (back with SONAR 2 or 4), and they corrected it for me. Do you have access to your old mail account? If so, you should be able to change your email address within your account. If not. Just to be sure, I would contact Cakewalk with the email change.
All the best.

I still have access to my old email account. Thanks, I change it and see what happens.