I have no idea about VBA programming so I cannot help you with the details, but depending on whether Excel (or the scripting host, I don't know where VBA scripts are executed) is a 32-bit or 64-bit application, you will have to grab the appropriate 32-bit or 64-bit version. Also check which operating system you are running, as there are currently no binaries provided that are guaranteed to work on Windows Vista and older.