Staring To Fail Me

I have used this app for years and have loved it. But lately I am liking it less and less. My text size shrunk from 25 pt to 12 pt and now when I try to change the point size it shuts the app down. Only parts of my notebook saves to Dropbox. And a lot of my notes are disappearing.

What is up with my notebook?

Milosmom52 about Notebook, v2.2.1