I *think* it's so it runs on your PC, be it 32/64 bit.
And whether it has older direct (XP, like me
) or newer direct x (10+).
So, yes it does the same thing.
So on your win7 64, you'll use the Editor 64.exe (I *think* it's also DX10+) and your server will run Data Server.exe because it's 32 XP (I *think*)
You'll need to build a 32bit (directX 9) for older machines and 32bit DX10+
and 64bit DX10+ builds for your visa/win7/8 players.
I'm really glad esenthel support winXP!!! it's old but it's faassst!