hi i am a newbie so need help, my current Frimware is 8.0.1 and i want to update it to 8.1 , just need the steps so that i dont lose my CFW option, as my per my understanding , should i update the switch to the latest verion by downliading it by connecting it to my wifi, that wil be all and then update my CFW (renix) on the sdcard to the latest and it will work , or is there any other step i have to do kinldy support me.