If you receive the error message "The application “Klok2” unexpectedly quit while trying to restore its windows. Do you want to try to restore its windows again?"
In our research this has to do with how a MAC saves the state of open programs when you shutdown your pc. You will need to delete the saved state directory for Klok.
The location for the saved state is: /Users/[user]/Library/Saved Application State
The directory in that location to delete is: Klok2.DD7F2188B985C2439837C76B42A187050457E61B.1.savedState