How to reload CS 5.5 on MacBook Air running macOS Big Sur

I have Adobe Creative Suite 5.5. It was on my MacBook Air, but I lost it when I upgraded to  Mac OS Big Sur. I downloaded CS 5.5, but when I try to open it, it says, "

The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information." Is it going to be possible for me to use Photoshop and other apps in CS 5.5 again? Adobe says they don't support it anymore. If I can still use it, how do I get it to work?

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