This update solves the problem with Boards not being able to open its own documents after upgrading to iOS/iPadOS 16.2.

What you have to do:

Download this update and the update for the Mac app and then change the file extension for your existing documents from *.board to *.boards:

- Tap & hold on the file
- Choose Rename and change the file extension to .boards
- Tap Return and confirm by tapping “Use .boards”

Starting with iOS/iPadOS 16.2 the *.board extension is used by the Freeform app.

Fixed a potential crash when trying to drop an entry onto itself.