Clicking the button will redirect you to a site where you can download the new version of Unity. [1] X Research source You may be directed to a link to install Unity Hub instead, which is a manager for your Unity. It handles any Unity add-ons and updates.
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You’ll see the amount of space you need to complete the download. Make sure you have that space then click Next and the download will begin. This may take a few moments. You may need to give the program permission to install.