If it doesn’t have any hilarious comment at the bottom of the screen during the 20th Century Fox logo, it’s the most recent version. V4 also has the “short negotiations” line. Also, you can check the enclosed readme file.
As far as viewing order, I have no recommendation. My edits weren’t done with any intent on making the prequels more suitable to be seen first, or in any order. I’d advise making such a decision the same way you would with the actual films. (Personally, I lean toward release order, with machete order as a fun alternative.)
FE.org user OnlyOneKenobi did the cover artwork, and he’s been missing for quite a while. So I don’t have anything else other than what he provided. It’s very nice, though could use an expansion.