Saturn 3 ultra version 1.5.7

I recently bought a new elegoo saturn 3 ultra and when I turned it on today it has the version 1.5.7. My other 3 printers only have 1.5.4 and when I even try to look for an update on the machine itself it says it doesn't have that functionality (it is connected to wifi) this new printer at 1.5.7 says its the latest version when I try to update on the machine. Does anyone know how to update to this latest version? The elegoo website doesn't even have it​