Guarantees between different UiPath version

Can you tell me how workflow works differently between version 2018.XXXs?
I use 2018.2.4 (Getting from —))
But my client’s PC uses version 2018.2.3 and it may be changed after I develop workflow.

I know “Execute Macro” activity can’t work in 2016.1.5999.
which developed in 2018.1.4

And Tell me where I can find installar version.2018.2.3.