Differences between photoshop v21.1.1 and v20.0.9 (never mind I figured it out Duuhhh)

[Kerkom]

I'm confused. Why does my cloud have two differnt versions of Photoshop to download? I've been working with the CC version but I have both on my computer? Should I uninstall one or the other?

[Nancy OShea]

Creative Cloud desktop app does not automatically uninstall old versions until you tell it to. 

If you're like me with ample hard disk space, you could have as many as 5 or 6 different versions installed on your machine at one time.  Owing to Adobe's new version policy,  getting pre-2019 versions is almost impossible now. So I like to keep old versions until I'm certain I will never need them again.