Appgyver suddenly fails to save application data

I have successfully saved changes to my app (BirdSoundFinland) today but during the last hour I haven’t managed to save even once despite hundred attempts. As I have understood the Appgyver updates of today shouldn’t apply to my application. At least I sincerely hope so!
Is there anything else blocking the process?

Now it turned out that the problem is wider than expected. When I tried to revert the last changes I made to my application, I was warned that Appgyver will revert all changes made within the last month. In other words, the system no longer recognizes changes made since the last save.

I wonder if it’s possible to get a downgraded version of Appgyver builder, the version I had yesterday?