Difference between 2019a and 2019b version?

What is the difference between 2019a and 2019b version?

Is it possible to update to the "b" version?

Answer 1

[Image Analyst]

See the release notes here

It is possible to upgrade - I've done it.

[Walter Roberson]

There is not really an "update", there is just installing the new version -- but possibly at no further cost, if you are covered by a software maintenance agreement.