If you want to use custom tanks in the new scenarios, you can manually edit game files to add your specific blueprints to the battle roster.

If you are not referring to the tank game, you might be looking for firmware updates. However, HP typically handles updates directly through the HP Sprocket App rather than standalone .rar files. V0.123 - New Scenario + General Improvements - SteamDB

Because of the transmission changes, check your low-speed maneuverability. If your tank struggles to turn in place, ensure your transmission settings aren't forcing both tracks to fight each other.

Mass and space displays were made more compact to give players a better view of their design stats while building.