The first time you open this new version, it may take several seconds (in fact, this is also true for future updates).
This is because all necessary files are downloaded and stored on your devices.
Once this is done, the Designer can be used offline (on pc/laptop as well as on mobile devices).
When you are back online, any courses you created will be synchronized to the server (and, from there on, to your other devices).
You can even restore deleted courses and earlier versions of a course!
When you save a course (and are online), the modification are saved on the server.
This allows you to restore an older version of a course or even restore a course after it has been deleted.
Note however that the old version are only retained for a limited amount of time (currently +/- 3 months, but this may vary).
As before, your courses are available wherever you need them: on your phone, tablet, pc and laptop!
Your courses are synchronized between all your devices.
As such, you can create a course on your laptop and access it on your phone or tablet.
Once syncrhonized, they remain available on those devices, even if you are offline.