I believe a more specific interpretation of what Snat and I were saying, is that you can probably just run the .bat version of the file from the command line in a cmd shell in windows.
blogger2wordpress.sh = ‘nix systems
blogger2wordpress.bat = windows systems
I could be missing something, but I can’t think of any reason why you should have to install cygwin on your machine if there is .bat version of the same file available. You may however, need to install python for windows.
I think the scripts are probably in python, but to be sure, my suggestion is that you read all the documentation that came with the converter programs and see if it is of any help.
This is my un-tested, best guess, theory how it probably works:
1) install python for windows on your machine, making sure the exe’s are added to your system path. That probably happens automatically using the installer and a reboot.
2) open a CMD window as administrator, and navigate to the directory that contains all of the converters files.
3) Now, from the command line, run the /bin/blogger2wordpress.bat file, making sure to include any required input and output file options that it needs.
That is a very general, and I’m sure incomplete, guess at what you probably need to do.
[edit] Just to clarify, all of this is done at your own risk, of course. This particular converter does not appear to be “beginner friendly” if you don’t recognize what is needed from reading the documenation. Understanding the documentation and how to acquire and run the dependencies to make it work has nothing to do with WordPress.