[nomad41]

I don’t exactly remember how it went but ~5 years ago Goodnotes 5 came out and they offered a “bundle” of Goodnotes 4 and 5 together at the same price of Goodnotes 5. Maybe owners of version 4 had some kind of discount on the bundle because they already owned half of it?

[zchrykng]

That isn't officially supported and is super error prone. People can end up getting charged more if things don't work perfectly.