Save the state of collapsed/expanded text upon close/open?

[jessegrosjean]

Yes that would explain it. More details on how to have your documents reopened can be found here:

How do I make TaskPaper restore open documents when it starts?

TaskPaper will remember documents that are open when you quit, and restore them when you next open TaskPaper. This feature requires that you quit TaskPaper with open documents. If you close the documents first, and then quit TaskPaper it won’t work. If this feature doesn’t seem to be working make sure that System Preferences > General > Close windows when quitting an app is not checked. If you prefer some apps to remember their open documents, and other apps to forget, you can set this …