Thank You very much, the previews look wonderful!
But be assured, you cannot open .exe-files on a native Mac.
If someone has, via third-party-software, Windows installed, it should work, as well as maybe with 64-bit supporting Wine + companions installed. Currently Wine, as a 32 Bit app, does work on machines running OS X 10.14 or earlier. (I´ll try that tonight, in an earlier version of this post, I assumed, that a really new MAC would be mandatory)
Cheers,
Boris