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zBrush Compositor and Steam Substance Painter

Hey there!
I own a 2022.0.8. License of zBrush and a Substance Painter 2021 License on Steam. Now I wanted to use zBrush Compositor to bring the model from zBrush to Substance Painter, however the Compositor (Version 2.4) specifies that it wont work with the Steam version and to convert the Steam License to a Standalone license using substance3d.com - But this website is offline.
Any idea what I can do to make this work ?