Since this was a server-side hot fix, your game client version number (e.g., v2.3.8) will not change. To confirm the changes are active for you:
Experiments now generate immediately after the tutorial ends, so new players don't have to wait for an in-game day to pass. If you are still experiencing issues, the developers at Round 3 Studios recommend reporting bugs via their Official Discord with a copy of your save file. essence level requirement that might still be locked? Monster Lab Simulator update for 20 February 2026 - SteamDB