The software neither provides for a different installation path nor a different folder in which to store the messages. Guess someone didn't pay attention to Windows programming guidelines To log on ...

After upgrading or updating OS X, you may find a new folder containing programs and program components from your system. Topher, an avid Mac user for the past 15 years, has been a contributing author ...

Run a copy job and copy your Program Files directory to the new location. Then, change the registry key for it in HKLM\Software\Microsoft\Windows\CurrentVersion. The key is named "ProgramFilesDir".