Help to decompile an .exe

I've found this .exe
(virus free and no ad or survey, don't worry)

http://rs171p3.rapidshare.com/cgi-bin/rsapi.cgi?sub=download&fileid=3226771130&filename=GL-LokeER%20BLUE%202012-11-20b.exe&dlauth=0123456789

to hack this game Galaxy Life ( http://www.kongregate.com/games/DigitalChocolate/galaxy-life?acomplete=galax ) and actually the hacks work and very well (are more hacks in one), but the guy want you do stupid survey and ad click before giving you the psw to make it work.
I wonder if there's any possibility of decompile the executable and see the code, I think that are just some aob changes but maybe is also some assembler code change.

Anyone can help or suggest me a good decompiler, thanks in advance!

Ida and hexrays

Of course, hexrays is not going to invent variable names for you, you’ll still have to make sense of the code and what it means to you.

personally, I like to use CE and OllyDBG in conjunction with ida

anyways, you might find this bit useful


it looks like changing the JNZ to a JZ shown above would be a great place to start.

happy reversing.

eta:
Ive thought of some other programs you might find useful for reversing on windows.

SoftICE
syser (never personally used, but its been touted as successor to softice)
ollydbg
w32dasm

Thanks a lot Kolonel! I'll see what I can do even if I think will harder than I thought (broken image removed)