A third-party object written in Java not working: error "no such object"

MaxMSPadvancedbugs/issues
Yas A's icon

Yas A

I've used some third party externals in the past without any issue, but this one is not identified as an object in Max 6.1 (64 bit) or Max 7 (32 bit trial version). I already tried putting them in the right path (in Windows - users/(user name)/documents/max/packages) and a few other paths in the folder where Max is installed.

The object is the one named 'Voiceleading' found at http://dmitri.mycpanel.princeton.edu/software.html
I attached the files in this post for the convenience of Windows users.

I think it could be related to how the .class file is compiled. The author claims it is Mac only - this might be an issue. I tried to compile the java code using a 64 bit compiler in Windows, but it creates 12 errors and doesn't compile the file.

It is much appreciated if someone could get this object to work.

Yas A's icon

Yas A

UPDATE:
The files cannot be submitted here. But, with Stuffit expander you can extract them easily on Mac. In Windows you can use some universal extractor to decompress the .SIT file downloadable at the link.

There is a .java file, .class file, and .help file.