About previous version 4.22

I want to use datasmith with previous version 4.22.
But now unreal studio is not available for download.

Is there a way to install datasmith?

Or is there a way to open the data created in the latest version in version 4.22?

have you tried installing that plugin from marketplace? Unreal Datasmith in Code Plugins - UE Marketplace

Quick answer on opening recent asset with old version of the engine is no.

Unless you 4.22 is a full application and you just need a one shot fix, you should consider bringing your 4.22 stuff to current version instead of doing the contrary.

thank you.