Revoke will just erase the permission you have given to the Kite Connect app to access your orders, positions, holdings, etc. of your Zerodha account. You will be prompted to give permission when you try to log into the Kite Connect app next time. You don't need to create a new app for this.
You will be prompted to give permission when you try to log into the Kite Connect app next time. You don't need to create a new app for this.