I want to switch to final release and I don't know if I can in future, when I update to 11.01.
If you are on 11.0 beta, just unenroll your device. If you have moved to the 11.0.1 beta, then you either just ride out the beta cycle then unenroll when it is publicly released, or if you want to get back to 11.0, you'll have to reinstall.
Apple Beta — Unenroll Your Devices
beta.apple.com