This is a program that you can try on your Surface Pro. Calibre. Web link: http://calibre-ebook.com/
It is a freeware ebook management program that has a built in converter. It gets updates all the time and what you can do after installing it on your Pro is to import the ebook into it and then hook up your Kindle Reader to it. It should recognize it and be able to send the ebook over to the Kindle in the proper format.
Check their web site for details and it does get updates all the time with newer drivers for ebook readers. Potentially, it can import ebooks from any source and output to a device in the proper format for it.