k, simple task for you...

open notepad and open that main.exe in it.
it most likely has some "understandable" words in it.
if you can't with these words get the info, take a copy of winrar or similar and open the exe in it.

these are the 2 easiest ways to get a quickie of what is the coder of the exe.
oh, and ofcourse you could simply try clicking on the exe-properties.
if it's packaged (SFX) it will have another tab for SFX info.
and it propably has something informative on the version tab too.
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