version="4.0" - The highest Niagara 4 release version of software which can run in the JACE. If a newer version of software is installed, the JACE will fail on startup with a license version error.
NOTE: Niagara 4 licenses, starting at version “4.0”, are not backward compatible with NiagaraAX (version “3.x”) software. At some future date when Niagara version 4.1 is released, a host with a version="4.1" license will be able to run Niagara 4.0 software as well as Niagara 4.1 software.