Question on patches/updating

Hi... new user to Offworld Trading and had a couple of questions.

 

I see there are patches released from time to time.  What is the way that I can apply those patches to my game?  I see a newer version posted than what I am running.. so just curious how I could get my game updated to the latest build.  FYI.. I bought my copy from the Epic game store.

 

and a related question.. is the game actually different depending on where I bought the game?  Different game stores will actually have different versions of the game?  Mohawk/Stardock has to actually create specific builds for each game store?  I'm new to the buying games online system... so curious how that works.

thanks much.

Peter