The Evolution of Digital Sculpting: Understanding ZBrush 2022
Maxon provides a dedicated "Downloads" archive section. If you own a perpetual license for ZBrush 2022 or hold an active subscription that includes legacy access, you will see a list of installers. zbrush 202208 link
Official patch notes and direct download links can also be found on the ZBrushCentral forum, which is a trusted community hub. zbrush 202208 link
Even with an official installer, users sometimes encounter problems. Here are the top three post-installation issues and their fixes: zbrush 202208 link