Forgive me for being obtuse, but why do we care what number?
If the updates were optional, or if it was incumbent upon the user to go find the update, download it and install it then it would definitely be important to have a consistent numbering system. However in this case, everybody is on the same version. We don’t even need to keep track of what version we are on. You start the sim and it says you need to update. You do the update or you don’t run the sim. You can’t decide to roll back to a previous version. You don’t keep an archive folder on your system to go back to if you need to re-install.
A version numbering system is entirely redundant in this environment. The server checks your version and it is either up to date or it isn’t and forces the update before the sim will run. Done.