My understanding is most "Patches" are save friendly and you can keep playing your current game.
The changes like the current cooldown for weapons will not take place till you start a new game.
You are usually warned if an update is save breaking, Ramma and Zabik are very good at including that info in the change log.
Yesterdays update is save compatible so you need only start a new game for the changes to take effect your save should play with no problems just no update.