Differences between the exe's in the program directory

[Zandy]

Hello all.

Can anyone explain me:
What's the difference between the executables in the program folder
C:\Program Files (x86)\FreeMind

FreeMind.exe
FreeMind32.exe
FreeMind64.exe

I think the 32- and 64-exe refers to the operating system, but: What's about the default FreeMind.exe (linked in the Windows program folder).
I use Windows 7 64-bit. Is FreeMind64.exe the correct one for me? Or can i use FreeMind.exe instead? Is there any difference?

Thanks for helping :)