After starting Tails and connecting to Tor, <span class="application">Tails Upgrader</span> automatically checks if upgrades are available and then proposes you to upgrade your USB stick. The upgrades are checked for and downloaded through Tor.
<p>If you cannot upgrade at startup (for example, if you have no network connection by then), you can start <span class="application">Tails Upgrader</span> later by opening a terminal and executing the following command:</p>