Do not update to ShotPro 2021 if you are in the middle of a project. You will not be able to load any projects from previous versions. In fact, none of the ShotPro versions are backwards compatible, and there is no way to export old projects into the "new" format.
In related news, if someone has version 1.5 that I can have, I need it to access a storyboarding project I was in the middle of when I foolishly updated my software. I have a subscription, but I need version 1.5 to access hundreds of hours of work that are completely gone in ShotPro 2021