How to Upgrade. If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes in some cases), then run the installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or bitcoind / bitcoin-qt (on Linux) .
Read moreIs Bitcoin Core a cold wallet?
Bitcoin Core can be run on an always-offline computer, creating an offline wallet (also called a cold wallet) . The offline wallet will securely store the private keys, while a separate online Bitcoin Core wallet will send and receive transactions.
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