Hi everyone,
The V22 update is currently being tested and if all goes well, should be available in the next 2-4 days.
There were no changes to the save data in V22, so the save folder will remain the same. The only issue we anticipate with not starting a new game is that you will not be able to find Arcadi.
As a cautionary note, if you want to be absolutely certain you can continue playing your existing game, we'd recommend not updating Vigilantes until you are ready to move on to a new game. You can find out how to do that here.