C++ EXE Source Recovery

I have a single Windows executable that was originally written in C++, but the working copy of the source code has been lost. The file is completely self-contained—no Boost, no custom DLLs, nothing to... (Budget: $10 - $30 AUD, Jobs: Binary Analysis, C Programming, C# Programming, C++ Programming, Reverse Engineering, Software Development, Software Testing, x86/x64 Assembler)