It's possible that:
New Course Elements: New items and solid block interactions were added to expand building possibilities.
New Environments: Features include new Mountain and Volcano themes, with unique "night" variations for the Volcano setting.
Recent Updates: As of early 2025, newer builds like 3.4.4F V2 have been released on Itch.io to fix persistent bugs found in the 4.0.0 beta. Safety and Compliance