The decision has been made to examine several of the defaults used in key modules and update out-of-date modules. While this does not greatly impact offline-software, it could have a greater impact in projects like icerec and simulation, where defaults once used may no longer be the same.
If you’re trying to run old scripts, and expecting default values from modules, you’d be advised to carefully check your scripts as you update them to the new V4-based releases.