Hey, forum members, we are all excited about the release of Bloc 4. Please remember that best practice is to always back up your Blocs 3 Project before migrating a project.
I made a Blocs 4 Folder and then copied my Bloc 3 project into the Blocs 4 folder. Then open Blocs 4 and open projects from the Blocs 4 folder.
Better be safe than sorry. Been there!
P.S., I’ve not had many problems migrating projects.
Here’s the full knowledge base article on migrating.