I thought eventually, you will be forced to updated the database? You can bypass the message for a while.
DJIgo4 can only see that a update is needed when DJIgo4 can reach a server, so leaving your iPhone or android in airplane mode would keep DJIgo4 from checking as I understand it. I also no longer update DJIGO4, with a iPhone, you can't go backwards, but you can turn on no auto updates. (No way to just keep DJIGO4 from updating and allow other apps to update).
I assume the no fly database works the same way.
Paul C