How to make Kobo books launch ADE

When I purchase a book at kobo.com and it goes into my kobo.com library listed as an Adobe DRM Ebook, then I click on the book, the wrong program (Sony PC Reader) is automatically launched.

I have set ADE to be the default program for *.acsm files; however, the book in the kobo.com library is not that format.

How do I force ADE to be launched when I click on the purchased Adobe DRM Ebook in kobo.com library?

Thanks!