If you bought the brushes already you do not need to buy them again. If you got them from my website, you could use the same download link in your email or account to download the updated files. If you got the brushes before November 2021, you download link is no longer valid. You will receive an email with a download link when the update is released. If you got the brushes from CreativeMarket.com or DesignCuts.com the update will available there as well and you can download the files over there.