Undo kills the app

Cashculator
1

Delete a category inside its group, press Command-Z to undo, the app dies,

2

Interesting. I just tried it on my Mac and it didn’t crash. So could you send me the crash report?
Could you please send me a copy of the crash log?
To find it:

  • Open Console.app
  • In the left sidebar, find the section named “Crash Reports”. Click on it.
  • In the main list, find rows containing Trickster and the date when it crashed
  • Right-click on the most recent one and select “Reveal in Finder” (or press ⌘R).
  • Attach the crash reports to this discussion and I’ll take a look at the reason for the crash. If possible, compress them in Finder first, before attaching.