Hi Jesse. First, Thanks for maintaining such a great app.
You’re right in putting this on the long term list, as it’s not really needed if you have your System Preferences set up to restore all open documents.
Everyone, if you want TaskPaper (and all other apps on your system) to automatically re-open documents and windows, deselect “Close windows when quitting an application” from the General pane of macOS System Preferences.
Meaning, you’d need to UNcheck this box:
Hope it helps.