Somewhat confusingly, there was an old launcher called 'Minecraft Unified Launcher', which was specifically for Windows 7 and 8 and only launched Java Edition and Minecraft Dungeons.

To update the Minecraft Realm to the latest version on PC, players need to follow the steps given below. Firstly, players need to launch the Minecraft Launcher app.

Here are the steps to download and play with Minecraft copper update features in Java Edition snapshot: Open the Minecraft official launcher. Select the Java Edition section.

Run Minecraft Java on your Steam Deck with my straightforward step-by-step guide, using Prism Launcher to keep things simple.